336721613 has 2 divisors, whose sum is σ = 336721614. Its totient is φ = 336721612.

The previous prime is 336721589. The next prime is 336721631. The reversal of 336721613 is 316127633.

Together with next prime (336721631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 299913124 + 36808489 = 17318^2 + 6067^2 .

It is a cyclic number.

It is not a de Polignac number, because 336721613 - 2¹⁰ = 336720589 is a prime.

It is a super-2 number, since 2×336721613² = 226762889322643538, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p_18127760 and since 336721613 and 18127760 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 336721613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (336721663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 168360806 + 168360807.

It is an arithmetic number, because the mean of its divisors is an integer number (168360807).

Almost surely, 2^336721613 is an apocalyptic number.

It is an amenable number.

336721613 is a deficient number, since it is larger than the sum of its proper divisors (1).

336721613 is an equidigital number, since it uses as much as digits as its factorization.

336721613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 32.

The square root of 336721613 is about 18349.9758310468. The cubic root of 336721613 is about 695.7026608156.

The spelling of 336721613 in words is "three hundred thirty-six million, seven hundred twenty-one thousand, six hundred thirteen".