402089279 has 2 divisors, whose sum is σ = 402089280. Its totient is φ = 402089278.

The previous prime is 402089257. The next prime is 402089291. The reversal of 402089279 is 972980204.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402089279 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402089209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201044639 + 201044640.

It is an arithmetic number, because the mean of its divisors is an integer number (201044640).

Almost surely, 2^402089279 is an apocalyptic number.

402089279 is a deficient number, since it is larger than the sum of its proper divisors (1).

402089279 is an equidigital number, since it uses as much as digits as its factorization.

402089279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 402089279 is about 20052.1639480631. The cubic root of 402089279 is about 738.0869009724.

The spelling of 402089279 in words is "four hundred two million, eighty-nine thousand, two hundred seventy-nine".