402023239 has 2 divisors, whose sum is σ = 402023240. Its totient is φ = 402023238.

The previous prime is 402023213. The next prime is 402023257. The reversal of 402023239 is 932320204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402023239 - 2⁵ = 402023207 is a prime.

It is a super-2 number, since 2×402023239² = 323245369392102242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402023269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201011619 + 201011620.

It is an arithmetic number, because the mean of its divisors is an integer number (201011620).

Almost surely, 2^402023239 is an apocalyptic number.

402023239 is a deficient number, since it is larger than the sum of its proper divisors (1).

402023239 is an equidigital number, since it uses as much as digits as its factorization.

402023239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 402023239 is about 20050.5171753748. The cubic root of 402023239 is about 738.0464904382.

The spelling of 402023239 in words is "four hundred two million, twenty-three thousand, two hundred thirty-nine".