172974497 has 2 divisors, whose sum is σ = 172974498. Its totient is φ = 172974496.

The previous prime is 172974469. The next prime is 172974511. The reversal of 172974497 is 794479271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165920161 + 7054336 = 12881^2 + 2656^2 .

It is a cyclic number.

It is not a de Polignac number, because 172974497 - 2⁶ = 172974433 is a prime.

It is a super-2 number, since 2×172974497² = 59840353224806018, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (172974427) 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 as a sum of consecutive naturals, namely, 86487248 + 86487249.

It is an arithmetic number, because the mean of its divisors is an integer number (86487249).

Almost surely, 2^172974497 is an apocalyptic number.

It is an amenable number.

172974497 is a deficient number, since it is larger than the sum of its proper divisors (1).

172974497 is an equidigital number, since it uses as much as digits as its factorization.

172974497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 889056, while the sum is 50.

The square root of 172974497 is about 13151.9769236416. The cubic root of 172974497 is about 557.1780838407.

The spelling of 172974497 in words is "one hundred seventy-two million, nine hundred seventy-four thousand, four hundred ninety-seven".