172874431 has 2 divisors, whose sum is σ = 172874432. Its totient is φ = 172874430.

The previous prime is 172874399. The next prime is 172874459. The reversal of 172874431 is 134478271.

It is a strong prime.

It is an emirp because it is prime and its reverse (134478271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172874431 - 2⁵ = 172874399 is a prime.

It is a super-2 number, since 2×172874431² = 59771137787147522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172874231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86437215 + 86437216.

It is an arithmetic number, because the mean of its divisors is an integer number (86437216).

Almost surely, 2^172874431 is an apocalyptic number.

172874431 is a deficient number, since it is larger than the sum of its proper divisors (1).

172874431 is an equidigital number, since it uses as much as digits as its factorization.

172874431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37632, while the sum is 37.

The square root of 172874431 is about 13148.1721543338. The cubic root of 172874431 is about 557.0706203361.

The spelling of 172874431 in words is "one hundred seventy-two million, eight hundred seventy-four thousand, four hundred thirty-one".