872998767491 has 2 divisors, whose sum is σ = 872998767492. Its totient is φ = 872998767490.

The previous prime is 872998767481. The next prime is 872998767539. The reversal of 872998767491 is 194767899278.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-872998767491 is a prime.

It is not a weakly prime, because it can be changed into another prime (872998767401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436499383745 + 436499383746.

It is an arithmetic number, because the mean of its divisors is an integer number (436499383746).

Almost surely, 2^872998767491 is an apocalyptic number.

872998767491 is a deficient number, since it is larger than the sum of its proper divisors (1).

872998767491 is an equidigital number, since it uses as much as digits as its factorization.

872998767491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768144384, while the sum is 77.

The spelling of 872998767491 in words is "eight hundred seventy-two billion, nine hundred ninety-eight million, seven hundred sixty-seven thousand, four hundred ninety-one".