402789287 has 2 divisors, whose sum is σ = 402789288. Its totient is φ = 402789286.

The previous prime is 402789269. The next prime is 402789353. The reversal of 402789287 is 782987204.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402789287 - 2⁸ = 402789031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402789217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201394643 + 201394644.

It is an arithmetic number, because the mean of its divisors is an integer number (201394644).

Almost surely, 2^402789287 is an apocalyptic number.

402789287 is a deficient number, since it is larger than the sum of its proper divisors (1).

402789287 is an equidigital number, since it uses as much as digits as its factorization.

402789287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 402789287 is about 20069.6110326035. The cubic root of 402789287 is about 738.5149710767.

The spelling of 402789287 in words is "four hundred two million, seven hundred eighty-nine thousand, two hundred eighty-seven".