13779149 has 2 divisors, whose sum is σ = 13779150. Its totient is φ = 13779148.

The previous prime is 13779137. The next prime is 13779151. The reversal of 13779149 is 94197731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13468900 + 310249 = 3670^2 + 557^2 .

It is a cyclic number.

It is not a de Polignac number, because 13779149 - 2¹² = 13775053 is a prime.

It is a Sophie Germain prime.

Together with 13779151, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13779109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6889574 + 6889575.

It is an arithmetic number, because the mean of its divisors is an integer number (6889575).

Almost surely, 2^13779149 is an apocalyptic number.

It is an amenable number.

13779149 is a deficient number, since it is larger than the sum of its proper divisors (1).

13779149 is an equidigital number, since it uses as much as digits as its factorization.

13779149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47628, while the sum is 41.

The square root of 13779149 is about 3712.0276130438. The cubic root of 13779149 is about 239.7401643928.

The spelling of 13779149 in words is "thirteen million, seven hundred seventy-nine thousand, one hundred forty-nine".