157907491 has 16 divisors (see below), whose sum is σ = 183577600. Its totient is φ = 133031808.

The previous prime is 157907483. The next prime is 157907501. The reversal of 157907491 is 194709751.

157907491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 157907491 - 2³ = 157907483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157907401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155995 + ... + 157003.

It is an arithmetic number, because the mean of its divisors is an integer number (11473600).

Almost surely, 2^157907491 is an apocalyptic number.

157907491 is a deficient number, since it is larger than the sum of its proper divisors (25670109).

157907491 is a wasteful number, since it uses less digits than its factorization.

157907491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378.

The product of its (nonzero) digits is 79380, while the sum is 43.

The square root of 157907491 is about 12566.1247407464. The cubic root of 157907491 is about 540.5064875310.

The spelling of 157907491 in words is "one hundred fifty-seven million, nine hundred seven thousand, four hundred ninety-one".