87572117 has 16 divisors (see below), whose sum is σ = 96671232. Its totient is φ = 78965760.

The previous prime is 87572113. The next prime is 87572129. The reversal of 87572117 is 71127578.

It is a cyclic number.

It is not a de Polignac number, because 87572117 - 2² = 87572113 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87572113) 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, 55613 + ... + 57165.

It is an arithmetic number, because the mean of its divisors is an integer number (6041952).

Almost surely, 2^87572117 is an apocalyptic number.

It is an amenable number.

87572117 is a deficient number, since it is larger than the sum of its proper divisors (9099115).

87572117 is a wasteful number, since it uses less digits than its factorization.

87572117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1708.

The product of its digits is 27440, while the sum is 38.

The square root of 87572117 is about 9357.9974887793. The cubic root of 87572117 is about 444.0739349457.

The spelling of 87572117 in words is "eighty-seven million, five hundred seventy-two thousand, one hundred seventeen".