13019813 has 2 divisors, whose sum is σ = 13019814. Its totient is φ = 13019812.

The previous prime is 13019803. The next prime is 13019857. The reversal of 13019813 is 31891031.

13019813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11175649 + 1844164 = 3343^2 + 1358^2 .

It is a cyclic number.

It is not a de Polignac number, because 13019813 - 2⁶ = 13019749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13019803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6509906 + 6509907.

It is an arithmetic number, because the mean of its divisors is an integer number (6509907).

Almost surely, 2^13019813 is an apocalyptic number.

It is an amenable number.

13019813 is a deficient number, since it is larger than the sum of its proper divisors (1).

13019813 is an equidigital number, since it uses as much as digits as its factorization.

13019813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 13019813 is about 3608.2977981314. The cubic root of 13019813 is about 235.2528619690.

The spelling of 13019813 in words is "thirteen million, nineteen thousand, eight hundred thirteen".