63625643 has 2 divisors, whose sum is σ = 63625644. Its totient is φ = 63625642.

The previous prime is 63625637. The next prime is 63625693. The reversal of 63625643 is 34652636.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63625643 - 2⁶ = 63625579 is a prime.

It is equal to p_3764159 and since 63625643 and 3764159 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (63625633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31812821 + 31812822.

It is an arithmetic number, because the mean of its divisors is an integer number (31812822).

Almost surely, 2^63625643 is an apocalyptic number.

63625643 is a deficient number, since it is larger than the sum of its proper divisors (1).

63625643 is an equidigital number, since it uses as much as digits as its factorization.

63625643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 35.

The square root of 63625643 is about 7976.5683724268. The cubic root of 63625643 is about 399.2185639718.

The spelling of 63625643 in words is "sixty-three million, six hundred twenty-five thousand, six hundred forty-three".