172373669 has 4 divisors (see below), whose sum is σ = 185633196. Its totient is φ = 159114144.

The previous prime is 172373629. The next prime is 172373689. The reversal of 172373669 is 966373271.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 54390625 + 117983044 = 7375^2 + 10862^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172373669 is a prime.

It is a super-2 number, since 2×172373669² = 59425363529043122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172373629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6629744 + ... + 6629769.

It is an arithmetic number, because the mean of its divisors is an integer number (46408299).

Almost surely, 2^172373669 is an apocalyptic number.

It is an amenable number.

172373669 is a deficient number, since it is larger than the sum of its proper divisors (13259527).

172373669 is a wasteful number, since it uses less digits than its factorization.

172373669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13259526.

The product of its digits is 285768, while the sum is 44.

The square root of 172373669 is about 13129.1153167302. The cubic root of 172373669 is about 556.5322149299.

The spelling of 172373669 in words is "one hundred seventy-two million, three hundred seventy-three thousand, six hundred sixty-nine".