172964557 has 2 divisors, whose sum is σ = 172964558. Its totient is φ = 172964556.

The previous prime is 172964549. The next prime is 172964567. The reversal of 172964557 is 755469271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146555236 + 26409321 = 12106^2 + 5139^2 .

It is a cyclic number.

It is not a de Polignac number, because 172964557 - 2³ = 172964549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172964567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86482278 + 86482279.

It is an arithmetic number, because the mean of its divisors is an integer number (86482279).

Almost surely, 2^172964557 is an apocalyptic number.

It is an amenable number.

172964557 is a deficient number, since it is larger than the sum of its proper divisors (1).

172964557 is an equidigital number, since it uses as much as digits as its factorization.

172964557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 529200, while the sum is 46.

The square root of 172964557 is about 13151.5990282551. The cubic root of 172964557 is about 557.1674108680.

The spelling of 172964557 in words is "one hundred seventy-two million, nine hundred sixty-four thousand, five hundred fifty-seven".