63668431 has 2 divisors, whose sum is σ = 63668432. Its totient is φ = 63668430.

The previous prime is 63668401. The next prime is 63668443. The reversal of 63668431 is 13486636.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63668431 is a prime.

It is a super-2 number, since 2×63668431² = 8107338212003522, which contains 22 as substring.

It is equal to p_3766537 and since 63668431 and 3766537 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63668401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31834215 + 31834216.

It is an arithmetic number, because the mean of its divisors is an integer number (31834216).

Almost surely, 2^63668431 is an apocalyptic number.

63668431 is a deficient number, since it is larger than the sum of its proper divisors (1).

63668431 is an equidigital number, since it uses as much as digits as its factorization.

63668431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 37.

The square root of 63668431 is about 7979.2500274149. The cubic root of 63668431 is about 399.3080349010.

The spelling of 63668431 in words is "sixty-three million, six hundred sixty-eight thousand, four hundred thirty-one".