172316479 has 2 divisors, whose sum is σ = 172316480. Its totient is φ = 172316478.

The previous prime is 172316467. The next prime is 172316513. The reversal of 172316479 is 974613271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 172316479 - 2⁵ = 172316447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172316279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86158239 + 86158240.

It is an arithmetic number, because the mean of its divisors is an integer number (86158240).

Almost surely, 2^172316479 is an apocalyptic number.

172316479 is a deficient number, since it is larger than the sum of its proper divisors (1).

172316479 is an equidigital number, since it uses as much as digits as its factorization.

172316479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 40.

The square root of 172316479 is about 13126.9371522835. The cubic root of 172316479 is about 556.4706595153.

The spelling of 172316479 in words is "one hundred seventy-two million, three hundred sixteen thousand, four hundred seventy-nine".