63920531 has 2 divisors, whose sum is σ = 63920532. Its totient is φ = 63920530.

The previous prime is 63920513. The next prime is 63920539. The reversal of 63920531 is 13502936.

Together with previous prime (63920513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63920531 is a prime.

It is a super-2 number, since 2×63920531² = 8171668566643922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 63920494 and 63920503.

It is not a weakly prime, because it can be changed into another prime (63920539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31960265 + 31960266.

It is an arithmetic number, because the mean of its divisors is an integer number (31960266).

Almost surely, 2^63920531 is an apocalyptic number.

63920531 is a deficient number, since it is larger than the sum of its proper divisors (1).

63920531 is an equidigital number, since it uses as much as digits as its factorization.

63920531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 63920531 is about 7995.0316447154. The cubic root of 63920531 is about 399.8343710104.

The spelling of 63920531 in words is "sixty-three million, nine hundred twenty thousand, five hundred thirty-one".