13077809 has 2 divisors, whose sum is σ = 13077810. Its totient is φ = 13077808.

The previous prime is 13077787. The next prime is 13077821. The reversal of 13077809 is 90877031.

13077809 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., 11075584 + 2002225 = 3328^2 + 1415^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13077809 is a prime.

It is not a weakly prime, because it can be changed into another prime (13077839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6538904 + 6538905.

It is an arithmetic number, because the mean of its divisors is an integer number (6538905).

Almost surely, 2^13077809 is an apocalyptic number.

It is an amenable number.

13077809 is a deficient number, since it is larger than the sum of its proper divisors (1).

13077809 is an equidigital number, since it uses as much as digits as its factorization.

13077809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 13077809 is about 3616.3253448770. The cubic root of 13077809 is about 235.6016513250.

The spelling of 13077809 in words is "thirteen million, seventy-seven thousand, eight hundred nine".