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47149345 = 59429869
BaseRepresentation
bin1011001111011…
…1000100100001
310021201102202001
42303313010201
544032234340
64402324001
71111522435
oct263670441
9107642661
1047149345
1124684001
1213959601
1399caa29
1463949c5
15421529a
hex2cf7121

47149345 has 4 divisors (see below), whose sum is σ = 56579220. Its totient is φ = 37719472.

The previous prime is 47149343. The next prime is 47149351. The reversal of 47149345 is 54394174.

47149345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54394174 = 227197087.

It can be written as a sum of positive squares in 2 ways, for example, as 10679824 + 36469521 = 3268^2 + 6039^2 .

It is a cyclic number.

It is not a de Polignac number, because 47149345 - 21 = 47149343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47149343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4714930 + ... + 4714939.

It is an arithmetic number, because the mean of its divisors is an integer number (14144805).

Almost surely, 247149345 is an apocalyptic number.

It is an amenable number.

47149345 is a deficient number, since it is larger than the sum of its proper divisors (9429875).

47149345 is an equidigital number, since it uses as much as digits as its factorization.

47149345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9429874.

The product of its digits is 60480, while the sum is 37.

The square root of 47149345 is about 6866.5380651388. The cubic root of 47149345 is about 361.2644450907.

The spelling of 47149345 in words is "forty-seven million, one hundred forty-nine thousand, three hundred forty-five".

Divisors: 1 5 9429869 47149345