86908231 has 2 divisors, whose sum is σ = 86908232. Its totient is φ = 86908230.

The previous prime is 86908193. The next prime is 86908243. The reversal of 86908231 is 13280968.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86908231 - 2⁹ = 86907719 is a prime.

It is a super-2 number, since 2×86908231² = 15106081231098722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86908271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43454115 + 43454116.

It is an arithmetic number, because the mean of its divisors is an integer number (43454116).

Almost surely, 2^86908231 is an apocalyptic number.

86908231 is a deficient number, since it is larger than the sum of its proper divisors (1).

86908231 is an equidigital number, since it uses as much as digits as its factorization.

86908231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 86908231 is about 9322.4584203953. The cubic root of 86908231 is about 442.9489093466.

The spelling of 86908231 in words is "eighty-six million, nine hundred eight thousand, two hundred thirty-one".