157399307 has 24 divisors (see below), whose sum is σ = 179836272. Its totient is φ = 136866240.

The previous prime is 157399301. The next prime is 157399313. The reversal of 157399307 is 703993751.

It is an interprime number because it is at equal distance from previous prime (157399301) and next prime (157399313).

It is a de Polignac number, because none of the positive numbers 2^k-157399307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157399301) 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 23 ways as a sum of consecutive naturals, for example, 537053 + ... + 537345.

It is an arithmetic number, because the mean of its divisors is an integer number (7493178).

Almost surely, 2^157399307 is an apocalyptic number.

157399307 is a deficient number, since it is larger than the sum of its proper divisors (22436965).

157399307 is a wasteful number, since it uses less digits than its factorization.

157399307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411 (or 380 counting only the distinct ones).

The product of its (nonzero) digits is 178605, while the sum is 44.

The square root of 157399307 is about 12545.8880514693. Note that the first 3 decimals coincide. The cubic root of 157399307 is about 539.9260381098.

The spelling of 157399307 in words is "one hundred fifty-seven million, three hundred ninety-nine thousand, three hundred seven".