872636173 has 2 divisors, whose sum is σ = 872636174. Its totient is φ = 872636172.

The previous prime is 872636131. The next prime is 872636179. The reversal of 872636173 is 371636278.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 830477124 + 42159049 = 28818^2 + 6493^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-872636173 is a prime.

It is a super-2 number, since 2×872636173² = 1522987780856171858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (872636179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436318086 + 436318087.

It is an arithmetic number, because the mean of its divisors is an integer number (436318087).

Almost surely, 2^872636173 is an apocalyptic number.

It is an amenable number.

872636173 is a deficient number, since it is larger than the sum of its proper divisors (1).

872636173 is an equidigital number, since it uses as much as digits as its factorization.

872636173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 43.

The square root of 872636173 is about 29540.4159246277. The cubic root of 872636173 is about 955.6035120639.

The spelling of 872636173 in words is "eight hundred seventy-two million, six hundred thirty-six thousand, one hundred seventy-three".