402399659 has 2 divisors, whose sum is σ = 402399660. Its totient is φ = 402399658.

The previous prime is 402399619. The next prime is 402399661. The reversal of 402399659 is 956993204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402399659 - 2²⁴ = 385622443 is a prime.

Together with 402399661, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (402399619) 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, 201199829 + 201199830.

It is an arithmetic number, because the mean of its divisors is an integer number (201199830).

Almost surely, 2^402399659 is an apocalyptic number.

402399659 is a deficient number, since it is larger than the sum of its proper divisors (1).

402399659 is an equidigital number, since it uses as much as digits as its factorization.

402399659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 524880, while the sum is 47.

The square root of 402399659 is about 20059.9017694504. The cubic root of 402399659 is about 738.2767663448.

The spelling of 402399659 in words is "four hundred two million, three hundred ninety-nine thousand, six hundred fifty-nine".