157887917 has 16 divisors (see below), whose sum is σ = 178569600. Its totient is φ = 138335040.

The previous prime is 157887907. The next prime is 157887923. The reversal of 157887917 is 719788751.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 157887917 - 2⁸ = 157887661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157887907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42584 + ... + 46142.

It is an arithmetic number, because the mean of its divisors is an integer number (11160600).

Almost surely, 2^157887917 is an apocalyptic number.

It is an amenable number.

157887917 is a deficient number, since it is larger than the sum of its proper divisors (20681683).

157887917 is a wasteful number, since it uses less digits than its factorization.

157887917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3716.

The product of its digits is 987840, while the sum is 53.

The square root of 157887917 is about 12565.3458766562. The cubic root of 157887917 is about 540.4841531226.

The spelling of 157887917 in words is "one hundred fifty-seven million, eight hundred eighty-seven thousand, nine hundred seventeen".