501798013 has 2 divisors, whose sum is σ = 501798014. Its totient is φ = 501798012.

The previous prime is 501798001. The next prime is 501798043. The reversal of 501798013 is 310897105.

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., 421193529 + 80604484 = 20523^2 + 8978^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-501798013 is a prime.

It is equal to p_26445409 and since 501798013 and 26445409 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 501798013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (501798043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250899006 + 250899007.

It is an arithmetic number, because the mean of its divisors is an integer number (250899007).

Almost surely, 2^501798013 is an apocalyptic number.

It is an amenable number.

501798013 is a deficient number, since it is larger than the sum of its proper divisors (1).

501798013 is an equidigital number, since it uses as much as digits as its factorization.

501798013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 501798013 is about 22400.8484883944. The cubic root of 501798013 is about 794.6507770927.

The spelling of 501798013 in words is "five hundred one million, seven hundred ninety-eight thousand, thirteen".