87979615 has 16 divisors (see below), whose sum is σ = 107382240. Its totient is φ = 69189120.

The previous prime is 87979603. The next prime is 87979627. The reversal of 87979615 is 51697978.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (87979603) and next prime (87979627).

It is not a de Polignac number, because 87979615 - 2⁷ = 87979487 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93427 + ... + 94363.

It is an arithmetic number, because the mean of its divisors is an integer number (6711390).

Almost surely, 2^87979615 is an apocalyptic number.

87979615 is a deficient number, since it is larger than the sum of its proper divisors (19402625).

87979615 is a wasteful number, since it uses less digits than its factorization.

87979615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242.

The product of its digits is 952560, while the sum is 52.

The square root of 87979615 is about 9379.7449325661. The cubic root of 87979615 is about 444.7616701326.

The spelling of 87979615 in words is "eighty-seven million, nine hundred seventy-nine thousand, six hundred fifteen".