402000239 has 2 divisors, whose sum is σ = 402000240. Its totient is φ = 402000238.

The previous prime is 402000199. The next prime is 402000251. The reversal of 402000239 is 932000204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402000239 - 2²⁴ = 385223023 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 402000239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402000299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201000119 + 201000120.

It is an arithmetic number, because the mean of its divisors is an integer number (201000120).

Almost surely, 2^402000239 is an apocalyptic number.

402000239 is a deficient number, since it is larger than the sum of its proper divisors (1).

402000239 is an equidigital number, since it uses as much as digits as its factorization.

402000239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 402000239 is about 20049.9436158808. The cubic root of 402000239 is about 738.0324154699.

The spelling of 402000239 in words is "four hundred two million, two hundred thirty-nine", and thus it is an aban number.