157906397 has 16 divisors (see below), whose sum is σ = 183220800. Its totient is φ = 134576640.

The previous prime is 157906327. The next prime is 157906403. The reversal of 157906397 is 793609751.

It is a happy number.

It is not a de Polignac number, because 157906397 - 2⁸ = 157906141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157906327) 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 15 ways as a sum of consecutive naturals, for example, 16379 + ... + 24167.

It is an arithmetic number, because the mean of its divisors is an integer number (11451300).

Almost surely, 2^157906397 is an apocalyptic number.

It is an amenable number.

157906397 is a deficient number, since it is larger than the sum of its proper divisors (25314403).

157906397 is a wasteful number, since it uses less digits than its factorization.

157906397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7916.

The product of its (nonzero) digits is 357210, while the sum is 47.

The square root of 157906397 is about 12566.0812109424. The cubic root of 157906397 is about 540.5052392991.

The spelling of 157906397 in words is "one hundred fifty-seven million, nine hundred six thousand, three hundred ninety-seven".