402458789 has 2 divisors, whose sum is σ = 402458790. Its totient is φ = 402458788.

The previous prime is 402458759. The next prime is 402458827. The reversal of 402458789 is 987854204.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 269517889 + 132940900 = 16417^2 + 11530^2 .

It is a cyclic number.

It is not a de Polignac number, because 402458789 - 2⁸ = 402458533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402458729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201229394 + 201229395.

It is an arithmetic number, because the mean of its divisors is an integer number (201229395).

Almost surely, 2^402458789 is an apocalyptic number.

It is an amenable number.

402458789 is a deficient number, since it is larger than the sum of its proper divisors (1).

402458789 is an equidigital number, since it uses as much as digits as its factorization.

402458789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 645120, while the sum is 47.

The square root of 402458789 is about 20061.3755510434. The cubic root of 402458789 is about 738.3129262223.

The spelling of 402458789 in words is "four hundred two million, four hundred fifty-eight thousand, seven hundred eighty-nine".