87415979 has 16 divisors (see below), whose sum is σ = 105484800. Its totient is φ = 70766784.

The previous prime is 87415969. The next prime is 87415987. The reversal of 87415979 is 97951478.

It is a cyclic number.

It is not a de Polignac number, because 87415979 - 2¹⁶ = 87350443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87415969) 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, 53594 + ... + 55200.

It is an arithmetic number, because the mean of its divisors is an integer number (6592800).

Almost surely, 2^87415979 is an apocalyptic number.

87415979 is a deficient number, since it is larger than the sum of its proper divisors (18068821).

87415979 is a wasteful number, since it uses less digits than its factorization.

87415979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2042.

The product of its digits is 635040, while the sum is 50.

The square root of 87415979 is about 9349.6512769194. The cubic root of 87415979 is about 443.8098552072.

The spelling of 87415979 in words is "eighty-seven million, four hundred fifteen thousand, nine hundred seventy-nine".