13779143 has 6 divisors (see below), whose sum is σ = 16028856. Its totient is φ = 11810652.

The previous prime is 13779137. The next prime is 13779149. The reversal of 13779143 is 34197731.

It is an interprime number because it is at equal distance from previous prime (13779137) and next prime (13779149).

It is not a de Polignac number, because 13779143 - 2²⁰ = 12730567 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 (13779149) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 140555 + ... + 140652.

It is an arithmetic number, because the mean of its divisors is an integer number (2671476).

Almost surely, 2^13779143 is an apocalyptic number.

13779143 is a deficient number, since it is larger than the sum of its proper divisors (2249713).

13779143 is an equidigital number, since it uses as much as digits as its factorization.

13779143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281221 (or 281214 counting only the distinct ones).

The product of its digits is 15876, while the sum is 35.

The square root of 13779143 is about 3712.0268048601. The cubic root of 13779143 is about 239.7401295952.

The spelling of 13779143 in words is "thirteen million, seven hundred seventy-nine thousand, one hundred forty-three".