172504769 has 2 divisors, whose sum is σ = 172504770. Its totient is φ = 172504768.

The previous prime is 172504747. The next prime is 172504811. The reversal of 172504769 is 967405271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154057744 + 18447025 = 12412^2 + 4295^2 .

It is a cyclic number.

It is not a de Polignac number, because 172504769 - 2⁸ = 172504513 is a prime.

It is a super-2 number, since 2×172504769² = 59515790655486722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (172504469) 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, 86252384 + 86252385.

It is an arithmetic number, because the mean of its divisors is an integer number (86252385).

Almost surely, 2^172504769 is an apocalyptic number.

It is an amenable number.

172504769 is a deficient number, since it is larger than the sum of its proper divisors (1).

172504769 is an equidigital number, since it uses as much as digits as its factorization.

172504769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105840, while the sum is 41.

The square root of 172504769 is about 13134.1070880361. The cubic root of 172504769 is about 556.6732706656.

The spelling of 172504769 in words is "one hundred seventy-two million, five hundred four thousand, seven hundred sixty-nine".