63431773 has 2 divisors, whose sum is σ = 63431774. Its totient is φ = 63431772.

The previous prime is 63431749. The next prime is 63431783. The reversal of 63431773 is 37713436.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63075364 + 356409 = 7942^2 + 597^2 .

It is a cyclic number.

It is not a de Polignac number, because 63431773 - 2⁵ = 63431741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63431783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31715886 + 31715887.

It is an arithmetic number, because the mean of its divisors is an integer number (31715887).

Almost surely, 2^63431773 is an apocalyptic number.

It is an amenable number.

63431773 is a deficient number, since it is larger than the sum of its proper divisors (1).

63431773 is an equidigital number, since it uses as much as digits as its factorization.

63431773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31752, while the sum is 34.

The square root of 63431773 is about 7964.4066320097. The cubic root of 63431773 is about 398.8126728729.

The spelling of 63431773 in words is "sixty-three million, four hundred thirty-one thousand, seven hundred seventy-three".