63618623 has 2 divisors, whose sum is σ = 63618624. Its totient is φ = 63618622.

The previous prime is 63618571. The next prime is 63618637. The reversal of 63618623 is 32681636.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63618623 - 2⁶ = 63618559 is a prime.

It is a super-2 number, since 2×63618623² = 8094658384832258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63618823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31809311 + 31809312.

It is an arithmetic number, because the mean of its divisors is an integer number (31809312).

Almost surely, 2^63618623 is an apocalyptic number.

63618623 is a deficient number, since it is larger than the sum of its proper divisors (1).

63618623 is an equidigital number, since it uses as much as digits as its factorization.

63618623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 35.

The square root of 63618623 is about 7976.1283214352. The cubic root of 63618623 is about 399.2038811214.

The spelling of 63618623 in words is "sixty-three million, six hundred eighteen thousand, six hundred twenty-three".