172674427 has 2 divisors, whose sum is σ = 172674428. Its totient is φ = 172674426.

The previous prime is 172674391. The next prime is 172674443. The reversal of 172674427 is 724476271.

It is a strong prime.

It is an emirp because it is prime and its reverse (724476271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172674427 - 2²⁷ = 38456699 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172674427.

It is not a weakly prime, because it can be changed into another prime (172674727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86337213 + 86337214.

It is an arithmetic number, because the mean of its divisors is an integer number (86337214).

Almost surely, 2^172674427 is an apocalyptic number.

172674427 is a deficient number, since it is larger than the sum of its proper divisors (1).

172674427 is an equidigital number, since it uses as much as digits as its factorization.

172674427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 131712, while the sum is 40.

The square root of 172674427 is about 13140.5641811910. The cubic root of 172674427 is about 556.8557064506.

The spelling of 172674427 in words is "one hundred seventy-two million, six hundred seventy-four thousand, four hundred twenty-seven".