63638563 has 2 divisors, whose sum is σ = 63638564. Its totient is φ = 63638562.

The previous prime is 63638551. The next prime is 63638573. The reversal of 63638563 is 36583636.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63638563 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (63638573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31819281 + 31819282.

It is an arithmetic number, because the mean of its divisors is an integer number (31819282).

Almost surely, 2^63638563 is an apocalyptic number.

63638563 is a deficient number, since it is larger than the sum of its proper divisors (1).

63638563 is an equidigital number, since it uses as much as digits as its factorization.

63638563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 40.

The square root of 63638563 is about 7977.3782033949. The cubic root of 63638563 is about 399.2455842869.

The spelling of 63638563 in words is "sixty-three million, six hundred thirty-eight thousand, five hundred sixty-three".