402430789 has 2 divisors, whose sum is σ = 402430790. Its totient is φ = 402430788.

The previous prime is 402430753. The next prime is 402430801. The reversal of 402430789 is 987034204.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 397404225 + 5026564 = 19935^2 + 2242^2 .

It is a cyclic number.

It is not a de Polignac number, because 402430789 - 2⁹ = 402430277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402430489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201215394 + 201215395.

It is an arithmetic number, because the mean of its divisors is an integer number (201215395).

Almost surely, 2^402430789 is an apocalyptic number.

It is an amenable number.

402430789 is a deficient number, since it is larger than the sum of its proper divisors (1).

402430789 is an equidigital number, since it uses as much as digits as its factorization.

402430789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 402430789 is about 20060.6776804773. The cubic root of 402430789 is about 738.2958037724.

The spelling of 402430789 in words is "four hundred two million, four hundred thirty thousand, seven hundred eighty-nine".