86997899 has 2 divisors, whose sum is σ = 86997900. Its totient is φ = 86997898.

The previous prime is 86997887. The next prime is 86997913. The reversal of 86997899 is 99879968.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86997899 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (86997809) 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, 43498949 + 43498950.

It is an arithmetic number, because the mean of its divisors is an integer number (43498950).

Almost surely, 2^86997899 is an apocalyptic number.

86997899 is a deficient number, since it is larger than the sum of its proper divisors (1).

86997899 is an equidigital number, since it uses as much as digits as its factorization.

86997899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17635968, while the sum is 65.

The square root of 86997899 is about 9327.2664269871. The cubic root of 86997899 is about 443.1011952322.

The spelling of 86997899 in words is "eighty-six million, nine hundred ninety-seven thousand, eight hundred ninety-nine".