86550979 has 2 divisors, whose sum is σ = 86550980. Its totient is φ = 86550978.

The previous prime is 86550973. The next prime is 86551007. The reversal of 86550979 is 97905568.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86550979 is a prime.

It is not a weakly prime, because it can be changed into another prime (86550973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43275489 + 43275490.

It is an arithmetic number, because the mean of its divisors is an integer number (43275490).

Almost surely, 2^86550979 is an apocalyptic number.

86550979 is a deficient number, since it is larger than the sum of its proper divisors (1).

86550979 is an equidigital number, since it uses as much as digits as its factorization.

86550979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 680400, while the sum is 49.

The square root of 86550979 is about 9303.2778632050. The cubic root of 86550979 is about 442.3411352643.

The spelling of 86550979 in words is "eighty-six million, five hundred fifty thousand, nine hundred seventy-nine".