86997916493 has 4 divisors (see below), whose sum is σ = 89804300928. Its totient is φ = 84191532060.

The previous prime is 86997916469. The next prime is 86997916531. The reversal of 86997916493 is 39461979968.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86997916493 - 2⁶ = 86997916429 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86997916403) 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 in 3 ways as a sum of consecutive naturals, for example, 1403192171 + ... + 1403192232.

It is an arithmetic number, because the mean of its divisors is an integer number (22451075232).

Almost surely, 2^86997916493 is an apocalyptic number.

It is an amenable number.

86997916493 is a deficient number, since it is larger than the sum of its proper divisors (2806384435).

86997916493 is a wasteful number, since it uses less digits than its factorization.

86997916493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2806384434.

The product of its digits is 158723712, while the sum is 71.

The spelling of 86997916493 in words is "eighty-six billion, nine hundred ninety-seven million, nine hundred sixteen thousand, four hundred ninety-three".