157087617 has 4 divisors (see below), whose sum is σ = 209450160. Its totient is φ = 104725076.

The previous prime is 157087613. The next prime is 157087691. The reversal of 157087617 is 716780751.

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: 716780751 = 3 ⋅238926917.

It is a cyclic number.

It is not a de Polignac number, because 157087617 - 2² = 157087613 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157087613) 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, 26181267 + ... + 26181272.

It is an arithmetic number, because the mean of its divisors is an integer number (52362540).

Almost surely, 2^157087617 is an apocalyptic number.

It is an amenable number.

157087617 is a deficient number, since it is larger than the sum of its proper divisors (52362543).

157087617 is an equidigital number, since it uses as much as digits as its factorization.

157087617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52362542.

The product of its (nonzero) digits is 82320, while the sum is 42.

The square root of 157087617 is about 12533.4598974106. The cubic root of 157087617 is about 539.5694063949.

The spelling of 157087617 in words is "one hundred fifty-seven million, eighty-seven thousand, six hundred seventeen".