402639163 has 2 divisors, whose sum is σ = 402639164. Its totient is φ = 402639162.

The previous prime is 402639157. The next prime is 402639179. The reversal of 402639163 is 361936204.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402639163 - 2⁹ = 402638651 is a prime.

It is not a weakly prime, because it can be changed into another prime (402699163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201319581 + 201319582.

It is an arithmetic number, because the mean of its divisors is an integer number (201319582).

Almost surely, 2^402639163 is an apocalyptic number.

402639163 is a deficient number, since it is larger than the sum of its proper divisors (1).

402639163 is an equidigital number, since it uses as much as digits as its factorization.

402639163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 402639163 is about 20065.8706015961. The cubic root of 402639163 is about 738.4232087897.

The spelling of 402639163 in words is "four hundred two million, six hundred thirty-nine thousand, one hundred sixty-three".