157117613 has 4 divisors (see below), whose sum is σ = 159462720. Its totient is φ = 154772508.

The previous prime is 157117607. The next prime is 157117619. The reversal of 157117613 is 316711751.

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.

It is an interprime number because it is at equal distance from previous prime (157117607) and next prime (157117619).

It is a cyclic number.

It is not a de Polignac number, because 157117613 - 2¹⁴ = 157101229 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 157117613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157117619) 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, 1172453 + ... + 1172586.

It is an arithmetic number, because the mean of its divisors is an integer number (39865680).

Almost surely, 2^157117613 is an apocalyptic number.

It is an amenable number.

157117613 is a deficient number, since it is larger than the sum of its proper divisors (2345107).

157117613 is an equidigital number, since it uses as much as digits as its factorization.

157117613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345106.

The product of its digits is 4410, while the sum is 32.

The square root of 157117613 is about 12534.6564771437. The cubic root of 157117613 is about 539.6037479387.

The spelling of 157117613 in words is "one hundred fifty-seven million, one hundred seventeen thousand, six hundred thirteen".