13078861 has 2 divisors, whose sum is σ = 13078862. Its totient is φ = 13078860.

The previous prime is 13078853. The next prime is 13078867. The reversal of 13078861 is 16887031.

13078861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13003236 + 75625 = 3606^2 + 275^2 .

It is a cyclic number.

It is not a de Polignac number, because 13078861 - 2³ = 13078853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13078867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6539430 + 6539431.

It is an arithmetic number, because the mean of its divisors is an integer number (6539431).

Almost surely, 2^13078861 is an apocalyptic number.

It is an amenable number.

13078861 is a deficient number, since it is larger than the sum of its proper divisors (1).

13078861 is an equidigital number, since it uses as much as digits as its factorization.

13078861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 13078861 is about 3616.4707934670. The cubic root of 13078861 is about 235.6079685476.

The spelling of 13078861 in words is "thirteen million, seventy-eight thousand, eight hundred sixty-one".