87758979 has 16 divisors (see below), whose sum is σ = 145885440. Its totient is φ = 45588960.

The previous prime is 87758963. The next prime is 87758999. The reversal of 87758979 is 97985778.

It is not a de Polignac number, because 87758979 - 2⁴ = 87758963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87758999) 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, 189724 + ... + 190185.

It is an arithmetic number, because the mean of its divisors is an integer number (9117840).

Almost surely, 2^87758979 is an apocalyptic number.

87758979 is a deficient number, since it is larger than the sum of its proper divisors (58126461).

87758979 is a wasteful number, since it uses less digits than its factorization.

87758979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379930.

The product of its digits is 8890560, while the sum is 60.

The square root of 87758979 is about 9367.9762489024. The cubic root of 87758979 is about 444.3895665830.

The spelling of 87758979 in words is "eighty-seven million, seven hundred fifty-eight thousand, nine hundred seventy-nine".