86990699 has 2 divisors, whose sum is σ = 86990700. Its totient is φ = 86990698.

The previous prime is 86990689. The next prime is 86990707. The reversal of 86990699 is 99609968.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86990699 - 2⁸ = 86990443 is a prime.

It is not a weakly prime, because it can be changed into another prime (86990609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43495349 + 43495350.

It is an arithmetic number, because the mean of its divisors is an integer number (43495350).

Almost surely, 2^86990699 is an apocalyptic number.

86990699 is a deficient number, since it is larger than the sum of its proper divisors (1).

86990699 is an equidigital number, since it uses as much as digits as its factorization.

86990699 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1889568, while the sum is 56.

The square root of 86990699 is about 9326.8804538281. The cubic root of 86990699 is about 443.0889711185.

The spelling of 86990699 in words is "eighty-six million, nine hundred ninety thousand, six hundred ninety-nine".