157599397 has 4 divisors (see below), whose sum is σ = 157658656. Its totient is φ = 157540140.

The previous prime is 157599389. The next prime is 157599437. The reversal of 157599397 is 793995751.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 793995751 = 311 ⋅2553041.

It is a cyclic number.

It is not a de Polignac number, because 157599397 - 2³ = 157599389 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 (157599347) 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 3 ways as a sum of consecutive naturals, for example, 25443 + ... + 31024.

It is an arithmetic number, because the mean of its divisors is an integer number (39414664).

Almost surely, 2^157599397 is an apocalyptic number.

It is an amenable number.

157599397 is a deficient number, since it is larger than the sum of its proper divisors (59259).

157599397 is an equidigital number, since it uses as much as digits as its factorization.

157599397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59258.

The product of its digits is 2679075, while the sum is 55.

The square root of 157599397 is about 12553.8598446852. The cubic root of 157599397 is about 540.1547304653.

The spelling of 157599397 in words is "one hundred fifty-seven million, five hundred ninety-nine thousand, three hundred ninety-seven".