86979951 has 12 divisors (see below), whose sum is σ = 131100528. Its totient is φ = 55465344.

The previous prime is 86979923. The next prime is 86979953. The reversal of 86979951 is 15997968.

It is not a de Polignac number, because 86979951 - 2¹¹ = 86977903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86979953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 209890 + ... + 210303.

It is an arithmetic number, because the mean of its divisors is an integer number (10925044).

Almost surely, 2^86979951 is an apocalyptic number.

86979951 is a deficient number, since it is larger than the sum of its proper divisors (44120577).

86979951 is a wasteful number, since it uses less digits than its factorization.

86979951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420222 (or 420219 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 54.

The square root of 86979951 is about 9326.3042519532. The cubic root of 86979951 is about 443.0707219782.

The spelling of 86979951 in words is "eighty-six million, nine hundred seventy-nine thousand, nine hundred fifty-one".