402664319 has 2 divisors, whose sum is σ = 402664320. Its totient is φ = 402664318.

The previous prime is 402664307. The next prime is 402664417. The reversal of 402664319 is 913466204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402664319 - 2¹⁶ = 402598783 is a prime.

It is a super-2 number, since 2×402664319² = 324277107591467522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402664019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201332159 + 201332160.

It is an arithmetic number, because the mean of its divisors is an integer number (201332160).

Almost surely, 2^402664319 is an apocalyptic number.

402664319 is a deficient number, since it is larger than the sum of its proper divisors (1).

402664319 is an equidigital number, since it uses as much as digits as its factorization.

402664319 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 402664319 is about 20066.4974273040. The cubic root of 402664319 is about 738.4385868164.

The spelling of 402664319 in words is "four hundred two million, six hundred sixty-four thousand, three hundred nineteen".