86174971 has 2 divisors, whose sum is σ = 86174972. Its totient is φ = 86174970.

The previous prime is 86174939. The next prime is 86174981. The reversal of 86174971 is 17947168.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86174971 - 2⁵ = 86174939 is a prime.

It is a super-2 number, since 2×86174971² = 14852251253701682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (86174981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43087485 + 43087486.

It is an arithmetic number, because the mean of its divisors is an integer number (43087486).

Almost surely, 2^86174971 is an apocalyptic number.

86174971 is a deficient number, since it is larger than the sum of its proper divisors (1).

86174971 is an equidigital number, since it uses as much as digits as its factorization.

86174971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 43.

The square root of 86174971 is about 9283.0475060726. The cubic root of 86174971 is about 441.6996434062.

The spelling of 86174971 in words is "eighty-six million, one hundred seventy-four thousand, nine hundred seventy-one".