172672001 has 2 divisors, whose sum is σ = 172672002. Its totient is φ = 172672000.

The previous prime is 172671991. The next prime is 172672051. The reversal of 172672001 is 100276271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139263601 + 33408400 = 11801^2 + 5780^2 .

It is a cyclic number.

It is not a de Polignac number, because 172672001 - 2¹⁰ = 172670977 is a prime.

It is not a weakly prime, because it can be changed into another prime (172672051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86336000 + 86336001.

It is an arithmetic number, because the mean of its divisors is an integer number (86336001).

Almost surely, 2^172672001 is an apocalyptic number.

It is an amenable number.

172672001 is a deficient number, since it is larger than the sum of its proper divisors (1).

172672001 is an equidigital number, since it uses as much as digits as its factorization.

172672001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 172672001 is about 13140.4718712838. The cubic root of 172672001 is about 556.8530985788.

The spelling of 172672001 in words is "one hundred seventy-two million, six hundred seventy-two thousand, one".