86964991 has 2 divisors, whose sum is σ = 86964992. Its totient is φ = 86964990.

The previous prime is 86964959. The next prime is 86965003. The reversal of 86964991 is 19946968.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86964991 - 2⁵ = 86964959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86964931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43482495 + 43482496.

It is an arithmetic number, because the mean of its divisors is an integer number (43482496).

Almost surely, 2^86964991 is an apocalyptic number.

86964991 is a deficient number, since it is larger than the sum of its proper divisors (1).

86964991 is an equidigital number, since it uses as much as digits as its factorization.

86964991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 52.

The square root of 86964991 is about 9325.5021848692. The cubic root of 86964991 is about 443.0453187369.

The spelling of 86964991 in words is "eighty-six million, nine hundred sixty-four thousand, nine hundred ninety-one".