402943589 has 2 divisors, whose sum is σ = 402943590. Its totient is φ = 402943588.

The previous prime is 402943559. The next prime is 402943691. The reversal of 402943589 is 985349204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 325802500 + 77141089 = 18050^2 + 8783^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402943589 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402943559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201471794 + 201471795.

It is an arithmetic number, because the mean of its divisors is an integer number (201471795).

Almost surely, 2^402943589 is an apocalyptic number.

It is an amenable number.

402943589 is a deficient number, since it is larger than the sum of its proper divisors (1).

402943589 is an equidigital number, since it uses as much as digits as its factorization.

402943589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 402943589 is about 20073.4548346815. The cubic root of 402943589 is about 738.6092633799.

The spelling of 402943589 in words is "four hundred two million, nine hundred forty-three thousand, five hundred eighty-nine".