13779111 has 4 divisors (see below), whose sum is σ = 18372152. Its totient is φ = 9186072.

The previous prime is 13779109. The next prime is 13779113. The reversal of 13779111 is 11197731.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11197731 = 3 ⋅3732577.

It is an interprime number because it is at equal distance from previous prime (13779109) and next prime (13779113).

It is not a de Polignac number, because 13779111 - 2¹ = 13779109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13779113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2296516 + ... + 2296521.

It is an arithmetic number, because the mean of its divisors is an integer number (4593038).

Almost surely, 2^13779111 is an apocalyptic number.

13779111 is a deficient number, since it is larger than the sum of its proper divisors (4593041).

13779111 is an equidigital number, since it uses as much as digits as its factorization.

13779111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4593040.

The product of its digits is 1323, while the sum is 30.

The square root of 13779111 is about 3712.0224945439. The cubic root of 13779111 is about 239.7399440082.

The spelling of 13779111 in words is "thirteen million, seven hundred seventy-nine thousand, one hundred eleven".