86899691 has 2 divisors, whose sum is σ = 86899692. Its totient is φ = 86899690.

The previous prime is 86899679. The next prime is 86899723. The reversal of 86899691 is 19699868.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86899691 - 2⁶ = 86899627 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (86899621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43449845 + 43449846.

It is an arithmetic number, because the mean of its divisors is an integer number (43449846).

Almost surely, 2^86899691 is an apocalyptic number.

86899691 is a deficient number, since it is larger than the sum of its proper divisors (1).

86899691 is an equidigital number, since it uses as much as digits as its factorization.

86899691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1679616, while the sum is 56.

The square root of 86899691 is about 9322.0003754559. Note that the first 3 decimals coincide. The cubic root of 86899691 is about 442.9344001433.

The spelling of 86899691 in words is "eighty-six million, eight hundred ninety-nine thousand, six hundred ninety-one".