63506623 has 2 divisors, whose sum is σ = 63506624. Its totient is φ = 63506622.

The previous prime is 63506591. The next prime is 63506627. The reversal of 63506623 is 32660536.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63506623 - 2⁵ = 63506591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63506627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31753311 + 31753312.

It is an arithmetic number, because the mean of its divisors is an integer number (31753312).

Almost surely, 2^63506623 is an apocalyptic number.

63506623 is a deficient number, since it is larger than the sum of its proper divisors (1).

63506623 is an equidigital number, since it uses as much as digits as its factorization.

63506623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 31.

The square root of 63506623 is about 7969.1042783992. The cubic root of 63506623 is about 398.9694785941.

The spelling of 63506623 in words is "sixty-three million, five hundred six thousand, six hundred twenty-three".