172368971 has 2 divisors, whose sum is σ = 172368972. Its totient is φ = 172368970.

The previous prime is 172368949. The next prime is 172368991. The reversal of 172368971 is 179863271.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172368971 is a prime.

It is a super-2 number, since 2×172368971² = 59422124327197682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (172368991) 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, 86184485 + 86184486.

It is an arithmetic number, because the mean of its divisors is an integer number (86184486).

Almost surely, 2^172368971 is an apocalyptic number.

172368971 is a deficient number, since it is larger than the sum of its proper divisors (1).

172368971 is an equidigital number, since it uses as much as digits as its factorization.

172368971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 44.

The square root of 172368971 is about 13128.9364001811. The cubic root of 172368971 is about 556.5271588365.

The spelling of 172368971 in words is "one hundred seventy-two million, three hundred sixty-eight thousand, nine hundred seventy-one".