63173881 has 2 divisors, whose sum is σ = 63173882. Its totient is φ = 63173880.

The previous prime is 63173863. The next prime is 63173909. The reversal of 63173881 is 18837136.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35295481 + 27878400 = 5941^2 + 5280^2 .

It is a cyclic number.

It is not a de Polignac number, because 63173881 - 2⁵ = 63173849 is a prime.

It is a super-2 number, since 2×63173881² = 7981878481204322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 63173881.

It is not a weakly prime, because it can be changed into another prime (63173821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31586940 + 31586941.

It is an arithmetic number, because the mean of its divisors is an integer number (31586941).

Almost surely, 2^63173881 is an apocalyptic number.

It is an amenable number.

63173881 is a deficient number, since it is larger than the sum of its proper divisors (1).

63173881 is an equidigital number, since it uses as much as digits as its factorization.

63173881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 37.

The square root of 63173881 is about 7948.1998590876. The cubic root of 63173881 is about 398.2714598823.

The spelling of 63173881 in words is "sixty-three million, one hundred seventy-three thousand, eight hundred eighty-one".