402445339 has 2 divisors, whose sum is σ = 402445340. Its totient is φ = 402445338.

The previous prime is 402445321. The next prime is 402445343. The reversal of 402445339 is 933544204.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402445339 - 2¹⁷ = 402314267 is a prime.

It is equal to p_21459643 and since 402445339 and 21459643 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (402445139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201222669 + 201222670.

It is an arithmetic number, because the mean of its divisors is an integer number (201222670).

Almost surely, 2^402445339 is an apocalyptic number.

402445339 is a deficient number, since it is larger than the sum of its proper divisors (1).

402445339 is an equidigital number, since it uses as much as digits as its factorization.

402445339 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 402445339 is about 20061.0403269621. The cubic root of 402445339 is about 738.3047014303.

The spelling of 402445339 in words is "four hundred two million, four hundred forty-five thousand, three hundred thirty-nine".