86687999 has 2 divisors, whose sum is σ = 86688000. Its totient is φ = 86687998.

The previous prime is 86687987. The next prime is 86688001. The reversal of 86687999 is 99978668.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86687999 - 2¹² = 86683903 is a prime.

Together with 86688001, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86687099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43343999 + 43344000.

It is an arithmetic number, because the mean of its divisors is an integer number (43344000).

Almost surely, 2^86687999 is an apocalyptic number.

86687999 is a deficient number, since it is larger than the sum of its proper divisors (1).

86687999 is an equidigital number, since it uses as much as digits as its factorization.

86687999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11757312, while the sum is 62.

The square root of 86687999 is about 9310.6390221080. The cubic root of 86687999 is about 442.5744375609.

The spelling of 86687999 in words is "eighty-six million, six hundred eighty-seven thousand, nine hundred ninety-nine".