63624641 has 2 divisors, whose sum is σ = 63624642. Its totient is φ = 63624640.

The previous prime is 63624619. The next prime is 63624643. The reversal of 63624641 is 14642636.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41731600 + 21893041 = 6460^2 + 4679^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63624641 is a prime.

Together with 63624643, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 63624598 and 63624607.

It is not a weakly prime, because it can be changed into another prime (63624643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31812320 + 31812321.

It is an arithmetic number, because the mean of its divisors is an integer number (31812321).

Almost surely, 2^63624641 is an apocalyptic number.

It is an amenable number.

63624641 is a deficient number, since it is larger than the sum of its proper divisors (1).

63624641 is an equidigital number, since it uses as much as digits as its factorization.

63624641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 32.

The square root of 63624641 is about 7976.5055632150. The cubic root of 63624641 is about 399.2164682806.

The spelling of 63624641 in words is "sixty-three million, six hundred twenty-four thousand, six hundred forty-one".