157097139 has 4 divisors (see below), whose sum is σ = 209462856. Its totient is φ = 104731424.

The previous prime is 157097137. The next prime is 157097177. The reversal of 157097139 is 931790751.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 157097139 - 2¹ = 157097137 is a prime.

It is a super-2 number, since 2×157097139² = 49359022163970642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 157097139.

It is not an unprimeable number, because it can be changed into a prime (157097131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26182854 + ... + 26182859.

It is an arithmetic number, because the mean of its divisors is an integer number (52365714).

Almost surely, 2^157097139 is an apocalyptic number.

157097139 is a deficient number, since it is larger than the sum of its proper divisors (52365717).

157097139 is an equidigital number, since it uses as much as digits as its factorization.

157097139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52365716.

The product of its (nonzero) digits is 59535, while the sum is 42.

The square root of 157097139 is about 12533.8397548397. The cubic root of 157097139 is about 539.5803083280.

The spelling of 157097139 in words is "one hundred fifty-seven million, ninety-seven thousand, one hundred thirty-nine".