402790637 has 2 divisors, whose sum is σ = 402790638. Its totient is φ = 402790636.

The previous prime is 402790631. The next prime is 402790669. The reversal of 402790637 is 736097204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 273604681 + 129185956 = 16541^2 + 11366^2 .

It is a cyclic number.

It is not a de Polignac number, because 402790637 - 2⁶ = 402790573 is a prime.

It is a super-3 number, since 3×402790637³ (a number of 27 digits) contains 333 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 402790637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402790631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201395318 + 201395319.

It is an arithmetic number, because the mean of its divisors is an integer number (201395319).

Almost surely, 2^402790637 is an apocalyptic number.

It is an amenable number.

402790637 is a deficient number, since it is larger than the sum of its proper divisors (1).

402790637 is an equidigital number, since it uses as much as digits as its factorization.

402790637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 38.

The square root of 402790637 is about 20069.6446655141. The cubic root of 402790637 is about 738.5157961517.

The spelling of 402790637 in words is "four hundred two million, seven hundred ninety thousand, six hundred thirty-seven".