402000889 has 2 divisors, whose sum is σ = 402000890. Its totient is φ = 402000888.

The previous prime is 402000857. The next prime is 402000913. The reversal of 402000889 is 988000204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 386790889 + 15210000 = 19667^2 + 3900^2 .

It is a cyclic number.

It is not a de Polignac number, because 402000889 - 2⁵ = 402000857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 402000889.

It is not a weakly prime, because it can be changed into another prime (402000089) 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, 201000444 + 201000445.

It is an arithmetic number, because the mean of its divisors is an integer number (201000445).

Almost surely, 2^402000889 is an apocalyptic number.

It is an amenable number.

402000889 is a deficient number, since it is larger than the sum of its proper divisors (1).

402000889 is an equidigital number, since it uses as much as digits as its factorization.

402000889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 402000889 is about 20049.9598253962. The cubic root of 402000889 is about 738.0328132481.

The spelling of 402000889 in words is "four hundred two million, eight hundred eighty-nine", and thus it is an aban number.