172548979 has 2 divisors, whose sum is σ = 172548980. Its totient is φ = 172548978.

The previous prime is 172548953. The next prime is 172548983. The reversal of 172548979 is 979845271.

172548979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172548979 - 2¹¹ = 172546931 is a prime.

It is not a weakly prime, because it can be changed into another prime (172548479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86274489 + 86274490.

It is an arithmetic number, because the mean of its divisors is an integer number (86274490).

Almost surely, 2^172548979 is an apocalyptic number.

172548979 is a deficient number, since it is larger than the sum of its proper divisors (1).

172548979 is an equidigital number, since it uses as much as digits as its factorization.

172548979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 52.

The square root of 172548979 is about 13135.7900028891. The cubic root of 172548979 is about 556.7208218595.

It can be divided in two parts, 1725489 and 79, that multiplied together give a palindrome (136313631).

The spelling of 172548979 in words is "one hundred seventy-two million, five hundred forty-eight thousand, nine hundred seventy-nine".