63941531 has 2 divisors, whose sum is σ = 63941532. Its totient is φ = 63941530.

The previous prime is 63941447. The next prime is 63941533. The reversal of 63941531 is 13514936.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63941531 is a prime.

It is a super-2 number, since 2×63941531² = 8177038773247922, which contains 22 as substring.

Together with 63941533, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63941533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31970765 + 31970766.

It is an arithmetic number, because the mean of its divisors is an integer number (31970766).

Almost surely, 2^63941531 is an apocalyptic number.

63941531 is a deficient number, since it is larger than the sum of its proper divisors (1).

63941531 is an equidigital number, since it uses as much as digits as its factorization.

63941531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 32.

The square root of 63941531 is about 7996.3448524935. The cubic root of 63941531 is about 399.8781524701.

The spelling of 63941531 in words is "sixty-three million, nine hundred forty-one thousand, five hundred thirty-one".