13646813 has 2 divisors, whose sum is σ = 13646814. Its totient is φ = 13646812.

The previous prime is 13646803. The next prime is 13646819. The reversal of 13646813 is 31864631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7991929 + 5654884 = 2827^2 + 2378^2 .

It is a cyclic number.

It is not a de Polignac number, because 13646813 - 2⁶ = 13646749 is a prime.

It is a super-3 number, since 3×13646813³ (a number of 22 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13646813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13646819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6823406 + 6823407.

It is an arithmetic number, because the mean of its divisors is an integer number (6823407).

Almost surely, 2^13646813 is an apocalyptic number.

It is an amenable number.

13646813 is a deficient number, since it is larger than the sum of its proper divisors (1).

13646813 is an equidigital number, since it uses as much as digits as its factorization.

13646813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 32.

The square root of 13646813 is about 3694.1593089633. The cubic root of 13646813 is about 238.9701998874.

The spelling of 13646813 in words is "thirteen million, six hundred forty-six thousand, eight hundred thirteen".