872491423 has 2 divisors, whose sum is σ = 872491424. Its totient is φ = 872491422.

The previous prime is 872491393. The next prime is 872491471. The reversal of 872491423 is 324194278.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 872491423 - 2¹⁷ = 872360351 is a prime.

It is a super-2 number, since 2×872491423² = 1522482566417129858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (872401423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436245711 + 436245712.

It is an arithmetic number, because the mean of its divisors is an integer number (436245712).

Almost surely, 2^872491423 is an apocalyptic number.

872491423 is a deficient number, since it is larger than the sum of its proper divisors (1).

872491423 is an equidigital number, since it uses as much as digits as its factorization.

872491423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 40.

The square root of 872491423 is about 29537.9657898102. The cubic root of 872491423 is about 955.5506716930.

The spelling of 872491423 in words is "eight hundred seventy-two million, four hundred ninety-one thousand, four hundred twenty-three".