402479687 has 2 divisors, whose sum is σ = 402479688. Its totient is φ = 402479686.

The previous prime is 402479681. The next prime is 402479723. The reversal of 402479687 is 786974204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402479687 - 2⁸ = 402479431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402479681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201239843 + 201239844.

It is an arithmetic number, because the mean of its divisors is an integer number (201239844).

Almost surely, 2^402479687 is an apocalyptic number.

402479687 is a deficient number, since it is larger than the sum of its proper divisors (1).

402479687 is an equidigital number, since it uses as much as digits as its factorization.

402479687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 677376, while the sum is 47.

The square root of 402479687 is about 20061.8963959044. The cubic root of 402479687 is about 738.3257051675.

The spelling of 402479687 in words is "four hundred two million, four hundred seventy-nine thousand, six hundred eighty-seven".