402000439 has 2 divisors, whose sum is σ = 402000440. Its totient is φ = 402000438.

The previous prime is 402000437. The next prime is 402000491. The reversal of 402000439 is 934000204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402000439 - 2¹ = 402000437 is a prime.

Together with 402000437, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402000433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201000219 + 201000220.

It is an arithmetic number, because the mean of its divisors is an integer number (201000220).

Almost surely, 2^402000439 is an apocalyptic number.

402000439 is a deficient number, since it is larger than the sum of its proper divisors (1).

402000439 is an equidigital number, since it uses as much as digits as its factorization.

402000439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 402000439 is about 20049.9486034254. The cubic root of 402000439 is about 738.0325378633.

The spelling of 402000439 in words is "four hundred two million, four hundred thirty-nine", and thus it is an aban number.