872635747913 has 2 divisors, whose sum is σ = 872635747914. Its totient is φ = 872635747912.

The previous prime is 872635747873. The next prime is 872635747943. The reversal of 872635747913 is 319747536278.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 822191935504 + 50443812409 = 906748^2 + 224597^2 .

It is a cyclic number.

It is not a de Polignac number, because 872635747913 - 2¹⁴ = 872635731529 is a prime.

It is a super-2 number, since 2×872635747913² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (872635747943) 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, 436317873956 + 436317873957.

It is an arithmetic number, because the mean of its divisors is an integer number (436317873957).

Almost surely, 2^872635747913 is an apocalyptic number.

It is an amenable number.

872635747913 is a deficient number, since it is larger than the sum of its proper divisors (1).

872635747913 is an equidigital number, since it uses as much as digits as its factorization.

872635747913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53343360, while the sum is 62.

The spelling of 872635747913 in words is "eight hundred seventy-two billion, six hundred thirty-five million, seven hundred forty-seven thousand, nine hundred thirteen".