13377891 has 16 divisors (see below), whose sum is σ = 18240768. Its totient is φ = 8719200.

The previous prime is 13377887. The next prime is 13377893. The reversal of 13377891 is 19877331.

It is a happy number.

It is not a de Polignac number, because 13377891 - 2² = 13377887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13377893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38380 + ... + 38726.

It is an arithmetic number, because the mean of its divisors is an integer number (1140048).

Almost surely, 2^13377891 is an apocalyptic number.

13377891 is a deficient number, since it is larger than the sum of its proper divisors (4862877).

13377891 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (13377890) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (602).

13377891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602.

The product of its digits is 31752, while the sum is 39.

The square root of 13377891 is about 3657.5799376090. The cubic root of 13377891 is about 237.3900713796.

The spelling of 13377891 in words is "thirteen million, three hundred seventy-seven thousand, eight hundred ninety-one".