172361129 has 2 divisors, whose sum is σ = 172361130. Its totient is φ = 172361128.

The previous prime is 172361117. The next prime is 172361153. The reversal of 172361129 is 921163271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 170041600 + 2319529 = 13040^2 + 1523^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172361129 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 172361095 and 172361104.

It is not a weakly prime, because it can be changed into another prime (172361029) 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, 86180564 + 86180565.

It is an arithmetic number, because the mean of its divisors is an integer number (86180565).

Almost surely, 2^172361129 is an apocalyptic number.

It is an amenable number.

172361129 is a deficient number, since it is larger than the sum of its proper divisors (1).

172361129 is an equidigital number, since it uses as much as digits as its factorization.

172361129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 32.

The square root of 172361129 is about 13128.6377434980. The cubic root of 172361129 is about 556.5187188949.

The spelling of 172361129 in words is "one hundred seventy-two million, three hundred sixty-one thousand, one hundred twenty-nine".