87969879 has 12 divisors (see below), whose sum is σ = 127155600. Its totient is φ = 58605984.

The previous prime is 87969863. The next prime is 87969881. The reversal of 87969879 is 97896978.

It is not a de Polignac number, because 87969879 - 2⁴ = 87969863 is a prime.

It is a super-2 number, since 2×87969879² = 15477399222549282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87969809) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16462 + ... + 21140.

It is an arithmetic number, because the mean of its divisors is an integer number (10596300).

Almost surely, 2^87969879 is an apocalyptic number.

87969879 is a deficient number, since it is larger than the sum of its proper divisors (39185721).

87969879 is a wasteful number, since it uses less digits than its factorization.

87969879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6774 (or 6771 counting only the distinct ones).

The product of its digits is 13716864, while the sum is 63.

The square root of 87969879 is about 9379.2259275486. The cubic root of 87969879 is about 444.7452634557.

The spelling of 87969879 in words is "eighty-seven million, nine hundred sixty-nine thousand, eight hundred seventy-nine".