63663731 has 2 divisors, whose sum is σ = 63663732. Its totient is φ = 63663730.

The previous prime is 63663683. The next prime is 63663749. The reversal of 63663731 is 13736636.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63663731 - 2⁶ = 63663667 is a prime.

It is a super-2 number, since 2×63663731² = 8106141289680722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 63663691 and 63663700.

It is not a weakly prime, because it can be changed into another prime (63663751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31831865 + 31831866.

It is an arithmetic number, because the mean of its divisors is an integer number (31831866).

Almost surely, 2^63663731 is an apocalyptic number.

63663731 is a deficient number, since it is larger than the sum of its proper divisors (1).

63663731 is an equidigital number, since it uses as much as digits as its factorization.

63663731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 35.

The square root of 63663731 is about 7978.9555080850. The cubic root of 63663731 is about 399.2982090270.

The spelling of 63663731 in words is "sixty-three million, six hundred sixty-three thousand, seven hundred thirty-one".