172074631 has 2 divisors, whose sum is σ = 172074632. Its totient is φ = 172074630.

The previous prime is 172074619. The next prime is 172074641. The reversal of 172074631 is 136470271.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172074631 - 2⁵ = 172074599 is a prime.

It is a super-2 number, since 2×172074631² = 59219357267572322, which contains 22 as substring.

It is equal to p_9612643 and since 172074631 and 9612643 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 172074593 and 172074602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172074601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86037315 + 86037316.

It is an arithmetic number, because the mean of its divisors is an integer number (86037316).

Almost surely, 2^172074631 is an apocalyptic number.

172074631 is a deficient number, since it is larger than the sum of its proper divisors (1).

172074631 is an equidigital number, since it uses as much as digits as its factorization.

172074631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 172074631 is about 13117.7220202290. The cubic root of 172074631 is about 556.2102001402.

The spelling of 172074631 in words is "one hundred seventy-two million, seventy-four thousand, six hundred thirty-one".