63945331 has 2 divisors, whose sum is σ = 63945332. Its totient is φ = 63945330.

The previous prime is 63945311. The next prime is 63945341. The reversal of 63945331 is 13354936.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63945331 - 2²¹ = 61848179 is a prime.

It is a super-2 number, since 2×63945331² = 8178010713399122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (63945311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31972665 + 31972666.

It is an arithmetic number, because the mean of its divisors is an integer number (31972666).

Almost surely, 2^63945331 is an apocalyptic number.

63945331 is a deficient number, since it is larger than the sum of its proper divisors (1).

63945331 is an equidigital number, since it uses as much as digits as its factorization.

63945331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29160, while the sum is 34.

The square root of 63945331 is about 7996.5824575252. The cubic root of 63945331 is about 399.8860738051.

The spelling of 63945331 in words is "sixty-three million, nine hundred forty-five thousand, three hundred thirty-one".