172307477 has 2 divisors, whose sum is σ = 172307478. Its totient is φ = 172307476.

The previous prime is 172307441. The next prime is 172307479. The reversal of 172307477 is 774703271.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108451396 + 63856081 = 10414^2 + 7991^2 .

It is a cyclic number.

It is not a de Polignac number, because 172307477 - 2⁸ = 172307221 is a prime.

Together with 172307479, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172307477.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172307479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86153738 + 86153739.

It is an arithmetic number, because the mean of its divisors is an integer number (86153739).

Almost surely, 2^172307477 is an apocalyptic number.

It is an amenable number.

172307477 is a deficient number, since it is larger than the sum of its proper divisors (1).

172307477 is an equidigital number, since it uses as much as digits as its factorization.

172307477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57624, while the sum is 38.

The square root of 172307477 is about 13126.5942650788. The cubic root of 172307477 is about 556.4609691360.

The spelling of 172307477 in words is "one hundred seventy-two million, three hundred seven thousand, four hundred seventy-seven".