86501999 has 2 divisors, whose sum is σ = 86502000. Its totient is φ = 86501998.

The previous prime is 86501971. The next prime is 86502029. The reversal of 86501999 is 99910568.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86501999 - 2⁸ = 86501743 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86501969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43250999 + 43251000.

It is an arithmetic number, because the mean of its divisors is an integer number (43251000).

Almost surely, 2^86501999 is an apocalyptic number.

86501999 is a deficient number, since it is larger than the sum of its proper divisors (1).

86501999 is an equidigital number, since it uses as much as digits as its factorization.

86501999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 174960, while the sum is 47.

The square root of 86501999 is about 9300.6450851540. The cubic root of 86501999 is about 442.2576778719.

The spelling of 86501999 in words is "eighty-six million, five hundred one thousand, nine hundred ninety-nine".