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147942749 = 732026613
BaseRepresentation
bin10001101000101…
…10110101011101
3101022101021022002
420310112311131
5300333131444
622402532045
73444330653
oct1064266535
9338337262
10147942749
1176567639
1241667025
132485b6b6
1415910dd3
15cec4d4e
hex8d16d5d

147942749 has 4 divisors (see below), whose sum is σ = 149969436. Its totient is φ = 145916064.

The previous prime is 147942733. The next prime is 147942787. The reversal of 147942749 is 947249741.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 109725625 + 38217124 = 10475^2 + 6182^2 .

It is a cyclic number.

It is not a de Polignac number, because 147942749 - 24 = 147942733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147942709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1013234 + ... + 1013379.

It is an arithmetic number, because the mean of its divisors is an integer number (37492359).

Almost surely, 2147942749 is an apocalyptic number.

It is an amenable number.

147942749 is a deficient number, since it is larger than the sum of its proper divisors (2026687).

147942749 is an equidigital number, since it uses as much as digits as its factorization.

147942749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2026686.

The product of its digits is 508032, while the sum is 47.

The square root of 147942749 is about 12163.1718313933. The cubic root of 147942749 is about 528.8890327716.

The spelling of 147942749 in words is "one hundred forty-seven million, nine hundred forty-two thousand, seven hundred forty-nine".

Divisors: 1 73 2026613 147942749