172536901 has 2 divisors, whose sum is σ = 172536902. Its totient is φ = 172536900.

The previous prime is 172536851. The next prime is 172536937. The reversal of 172536901 is 109635271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172291876 + 245025 = 13126^2 + 495^2 .

It is a cyclic number.

It is not a de Polignac number, because 172536901 - 2⁷ = 172536773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172536971) 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, 86268450 + 86268451.

It is an arithmetic number, because the mean of its divisors is an integer number (86268451).

Almost surely, 2^172536901 is an apocalyptic number.

It is an amenable number.

172536901 is a deficient number, since it is larger than the sum of its proper divisors (1).

172536901 is an equidigital number, since it uses as much as digits as its factorization.

172536901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 172536901 is about 13135.3302585051. The cubic root of 172536901 is about 556.7078318648.

The spelling of 172536901 in words is "one hundred seventy-two million, five hundred thirty-six thousand, nine hundred one".