157013891 has 4 divisors (see below), whose sum is σ = 165277800. Its totient is φ = 148749984.

The previous prime is 157013869. The next prime is 157013911. The reversal of 157013891 is 198310751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 198310751 = 31 ⋅6397121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157013891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157013821) 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, 4131926 + ... + 4131963.

It is an arithmetic number, because the mean of its divisors is an integer number (41319450).

Almost surely, 2^157013891 is an apocalyptic number.

157013891 is a deficient number, since it is larger than the sum of its proper divisors (8263909).

157013891 is an equidigital number, since it uses as much as digits as its factorization.

157013891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8263908.

The product of its (nonzero) digits is 7560, while the sum is 35.

The square root of 157013891 is about 12530.5183851268. The cubic root of 157013891 is about 539.4849810706.

The spelling of 157013891 in words is "one hundred fifty-seven million, thirteen thousand, eight hundred ninety-one".