13391777 has 12 divisors (see below), whose sum is σ = 15560640. Its totient is φ = 11289888.

The previous prime is 13391753. The next prime is 13391779. The reversal of 13391777 is 77719331.

13391777 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13391777 - 2¹⁴ = 13375393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13391777.

It is not an unprimeable number, because it can be changed into a prime (13391779) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37124 + ... + 37482.

It is an arithmetic number, because the mean of its divisors is an integer number (1296720).

Almost surely, 2^13391777 is an apocalyptic number.

It is an amenable number.

13391777 is a deficient number, since it is larger than the sum of its proper divisors (2168863).

13391777 is an frugal number, since it uses more digits than its factorization.

13391777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512 (or 439 counting only the distinct ones).

The product of its digits is 27783, while the sum is 38.

The square root of 13391777 is about 3659.4776949723. The cubic root of 13391777 is about 237.4721784585.

The spelling of 13391777 in words is "thirteen million, three hundred ninety-one thousand, seven hundred seventy-seven".