86623779 has 24 divisors (see below), whose sum is σ = 128020480. Its totient is φ = 52058160.

The previous prime is 86623769. The next prime is 86623787. The reversal of 86623779 is 97732668.

It is not a de Polignac number, because 86623779 - 2¹⁹ = 86099491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86623709) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45162 + ... + 47040.

Almost surely, 2^86623779 is an apocalyptic number.

86623779 is a deficient number, since it is larger than the sum of its proper divisors (41396701).

86623779 is a wasteful number, since it uses less digits than its factorization.

86623779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2031 (or 2020 counting only the distinct ones).

The product of its digits is 762048, while the sum is 48.

The square root of 86623779 is about 9307.1896402727. The cubic root of 86623779 is about 442.4651215766.

Subtracting 86623779 from its reverse (97732668), we obtain a square (11108889 = 3333²).

The spelling of 86623779 in words is "eighty-six million, six hundred twenty-three thousand, seven hundred seventy-nine".