402568693 has 2 divisors, whose sum is σ = 402568694. Its totient is φ = 402568692.

The previous prime is 402568679. The next prime is 402568723. The reversal of 402568693 is 396865204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 311804964 + 90763729 = 17658^2 + 9527^2 .

It is a cyclic number.

It is not a de Polignac number, because 402568693 - 2²¹ = 400471541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402568643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201284346 + 201284347.

It is an arithmetic number, because the mean of its divisors is an integer number (201284347).

Almost surely, 2^402568693 is an apocalyptic number.

It is an amenable number.

402568693 is a deficient number, since it is larger than the sum of its proper divisors (1).

402568693 is an equidigital number, since it uses as much as digits as its factorization.

402568693 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 43.

The square root of 402568693 is about 20064.1145580860. The cubic root of 402568693 is about 738.3801266089.

The spelling of 402568693 in words is "four hundred two million, five hundred sixty-eight thousand, six hundred ninety-three".