502638804397 has 2 divisors, whose sum is σ = 502638804398. Its totient is φ = 502638804396.

The previous prime is 502638804391. The next prime is 502638804413. The reversal of 502638804397 is 793408836205.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 375892836201 + 126745968196 = 613101^2 + 356014^2 .

It is a cyclic number.

It is not a de Polignac number, because 502638804397 - 2²³ = 502630415789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (502638804391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251319402198 + 251319402199.

It is an arithmetic number, because the mean of its divisors is an integer number (251319402199).

Almost surely, 2^502638804397 is an apocalyptic number.

It is an amenable number.

502638804397 is a deficient number, since it is larger than the sum of its proper divisors (1).

502638804397 is an equidigital number, since it uses as much as digits as its factorization.

502638804397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8709120, while the sum is 55.

The spelling of 502638804397 in words is "five hundred two billion, six hundred thirty-eight million, eight hundred four thousand, three hundred ninety-seven".