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133440493 = 1011321193
BaseRepresentation
bin1111111010000…
…10001111101101
3100022002110221111
413331002033231
5233130043433
621124032021
73210140224
oct775021755
9308073844
10133440493
11693618aa
1238832611
1321851794
1413a17cbb
15baacdcd
hex7f423ed

133440493 has 4 divisors (see below), whose sum is σ = 134761788. Its totient is φ = 132119200.

The previous prime is 133440487. The next prime is 133440521. The reversal of 133440493 is 394044331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 394044331 = 1231320101.

It can be written as a sum of positive squares in 2 ways, for example, as 88322404 + 45118089 = 9398^2 + 6717^2 .

It is a cyclic number.

It is not a de Polignac number, because 133440493 - 221 = 131343341 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 (133440193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 660496 + ... + 660697.

It is an arithmetic number, because the mean of its divisors is an integer number (33690447).

Almost surely, 2133440493 is an apocalyptic number.

It is an amenable number.

133440493 is a deficient number, since it is larger than the sum of its proper divisors (1321295).

133440493 is a wasteful number, since it uses less digits than its factorization.

133440493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321294.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 133440493 is about 11551.6446015275. The cubic root of 133440493 is about 511.0097807190.

The spelling of 133440493 in words is "one hundred thirty-three million, four hundred forty thousand, four hundred ninety-three".

Divisors: 1 101 1321193 133440493