172352491 has 2 divisors, whose sum is σ = 172352492. Its totient is φ = 172352490.

The previous prime is 172352441. The next prime is 172352513. The reversal of 172352491 is 194253271.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172352491 - 2⁹ = 172351979 is a prime.

It is not a weakly prime, because it can be changed into another prime (172352441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86176245 + 86176246.

It is an arithmetic number, because the mean of its divisors is an integer number (86176246).

Almost surely, 2^172352491 is an apocalyptic number.

172352491 is a deficient number, since it is larger than the sum of its proper divisors (1).

172352491 is an equidigital number, since it uses as much as digits as its factorization.

172352491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 34.

The square root of 172352491 is about 13128.3087638888. The cubic root of 172352491 is about 556.5094219630.

The spelling of 172352491 in words is "one hundred seventy-two million, three hundred fifty-two thousand, four hundred ninety-one".