63172639 has 2 divisors, whose sum is σ = 63172640. Its totient is φ = 63172638.

The previous prime is 63172631. The next prime is 63172649. The reversal of 63172639 is 93627136.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63172639 - 2³ = 63172631 is a prime.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 63172598 and 63172607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63172631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31586319 + 31586320.

It is an arithmetic number, because the mean of its divisors is an integer number (31586320).

Almost surely, 2^63172639 is an apocalyptic number.

63172639 is a deficient number, since it is larger than the sum of its proper divisors (1).

63172639 is an equidigital number, since it uses as much as digits as its factorization.

63172639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 37.

The square root of 63172639 is about 7948.1217278046. The cubic root of 63172639 is about 398.2688498564.

The spelling of 63172639 in words is "sixty-three million, one hundred seventy-two thousand, six hundred thirty-nine".