402554879 has 2 divisors, whose sum is σ = 402554880. Its totient is φ = 402554878.

The previous prime is 402554819. The next prime is 402554891. The reversal of 402554879 is 978455204.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402554879 - 2¹² = 402550783 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 (402554819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201277439 + 201277440.

It is an arithmetic number, because the mean of its divisors is an integer number (201277440).

Almost surely, 2^402554879 is an apocalyptic number.

402554879 is a deficient number, since it is larger than the sum of its proper divisors (1).

402554879 is an equidigital number, since it uses as much as digits as its factorization.

402554879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 403200, while the sum is 44.

The square root of 402554879 is about 20063.7703086932. The cubic root of 402554879 is about 738.3716807628.

The spelling of 402554879 in words is "four hundred two million, five hundred fifty-four thousand, eight hundred seventy-nine".