402443663 has 2 divisors, whose sum is σ = 402443664. Its totient is φ = 402443662.

The previous prime is 402443647. The next prime is 402443683. The reversal of 402443663 is 366344204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402443663 - 2⁴ = 402443647 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402443603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201221831 + 201221832.

It is an arithmetic number, because the mean of its divisors is an integer number (201221832).

Almost surely, 2^402443663 is an apocalyptic number.

402443663 is a deficient number, since it is larger than the sum of its proper divisors (1).

402443663 is an equidigital number, since it uses as much as digits as its factorization.

402443663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 32.

The square root of 402443663 is about 20060.9985544090. The cubic root of 402443663 is about 738.3036765289.

Adding to 402443663 its reverse (366344204), we get a palindrome (768787867).

The spelling of 402443663 in words is "four hundred two million, four hundred forty-three thousand, six hundred sixty-three".