872315173 has 2 divisors, whose sum is σ = 872315174. Its totient is φ = 872315172.

The previous prime is 872315167. The next prime is 872315209. The reversal of 872315173 is 371513278.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 809857764 + 62457409 = 28458^2 + 7903^2 .

It is a cyclic number.

It is not a de Polignac number, because 872315173 - 2⁹ = 872314661 is a prime.

It is a super-2 number, since 2×872315173² = 1521867522092039858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (872313173) 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, 436157586 + 436157587.

It is an arithmetic number, because the mean of its divisors is an integer number (436157587).

Almost surely, 2^872315173 is an apocalyptic number.

It is an amenable number.

872315173 is a deficient number, since it is larger than the sum of its proper divisors (1).

872315173 is an equidigital number, since it uses as much as digits as its factorization.

872315173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35280, while the sum is 37.

The square root of 872315173 is about 29534.9821906159. The cubic root of 872315173 is about 955.4863244902.

The spelling of 872315173 in words is "eight hundred seventy-two million, three hundred fifteen thousand, one hundred seventy-three".