63172957 has 2 divisors, whose sum is σ = 63172958. Its totient is φ = 63172956.

The previous prime is 63172951. The next prime is 63172981. The reversal of 63172957 is 75927136.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56235001 + 6937956 = 7499^2 + 2634^2 .

It is a cyclic number.

It is not a de Polignac number, because 63172957 - 2⁷ = 63172829 is a prime.

It is a super-2 number, since 2×63172957² = 7981644992247698, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63172951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31586478 + 31586479.

It is an arithmetic number, because the mean of its divisors is an integer number (31586479).

Almost surely, 2^63172957 is an apocalyptic number.

It is an amenable number.

63172957 is a deficient number, since it is larger than the sum of its proper divisors (1).

63172957 is an equidigital number, since it uses as much as digits as its factorization.

63172957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 79380, while the sum is 40.

The square root of 63172957 is about 7948.1417325058. The cubic root of 63172957 is about 398.2695181271.

The spelling of 63172957 in words is "sixty-three million, one hundred seventy-two thousand, nine hundred fifty-seven".