172755491 has 2 divisors, whose sum is σ = 172755492. Its totient is φ = 172755490.

The previous prime is 172755487. The next prime is 172755511. The reversal of 172755491 is 194557271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 172755491 - 2² = 172755487 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (172755431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86377745 + 86377746.

It is an arithmetic number, because the mean of its divisors is an integer number (86377746).

Almost surely, 2^172755491 is an apocalyptic number.

172755491 is a deficient number, since it is larger than the sum of its proper divisors (1).

172755491 is an equidigital number, since it uses as much as digits as its factorization.

172755491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 88200, while the sum is 41.

The square root of 172755491 is about 13143.6483139195. The cubic root of 172755491 is about 556.9428335943.

The spelling of 172755491 in words is "one hundred seventy-two million, seven hundred fifty-five thousand, four hundred ninety-one".