402403439 has 2 divisors, whose sum is σ = 402403440. Its totient is φ = 402403438.

The previous prime is 402403369. The next prime is 402403517. The reversal of 402403439 is 934304204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402403439 - 2¹² = 402399343 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402402439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201201719 + 201201720.

It is an arithmetic number, because the mean of its divisors is an integer number (201201720).

Almost surely, 2^402403439 is an apocalyptic number.

402403439 is a deficient number, since it is larger than the sum of its proper divisors (1).

402403439 is an equidigital number, since it uses as much as digits as its factorization.

402403439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 402403439 is about 20059.9959870385. The cubic root of 402403439 is about 738.2790780411.

The spelling of 402403439 in words is "four hundred two million, four hundred three thousand, four hundred thirty-nine".