86154979 has 2 divisors, whose sum is σ = 86154980. Its totient is φ = 86154978.

The previous prime is 86154973. The next prime is 86154989. The reversal of 86154979 is 97945168.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86154979 - 2⁵ = 86154947 is a prime.

It is not a weakly prime, because it can be changed into another prime (86154973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43077489 + 43077490.

It is an arithmetic number, because the mean of its divisors is an integer number (43077490).

Almost surely, 2^86154979 is an apocalyptic number.

86154979 is a deficient number, since it is larger than the sum of its proper divisors (1).

86154979 is an equidigital number, since it uses as much as digits as its factorization.

86154979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 49.

The square root of 86154979 is about 9281.9706420566. The cubic root of 86154979 is about 441.6654836723.

The spelling of 86154979 in words is "eighty-six million, one hundred fifty-four thousand, nine hundred seventy-nine".