87297913 has 8 divisors (see below), whose sum is σ = 92164320. Its totient is φ = 82458720.

The previous prime is 87297883. The next prime is 87297919. The reversal of 87297913 is 31979278.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87297913 - 2⁹ = 87297401 is a prime.

It is a super-2 number, since 2×87297913² = 15241851228311138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87297919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28 + ... + 13213.

It is an arithmetic number, because the mean of its divisors is an integer number (11520540).

Almost surely, 2^87297913 is an apocalyptic number.

It is an amenable number.

87297913 is a deficient number, since it is larger than the sum of its proper divisors (4866407).

87297913 is a wasteful number, since it uses less digits than its factorization.

87297913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13607.

The product of its digits is 190512, while the sum is 46.

The square root of 87297913 is about 9343.3352182184. The cubic root of 87297913 is about 443.6099586397.

The spelling of 87297913 in words is "eighty-seven million, two hundred ninety-seven thousand, nine hundred thirteen".