13780279 has 2 divisors, whose sum is σ = 13780280. Its totient is φ = 13780278.

The previous prime is 13780231. The next prime is 13780297. The reversal of 13780279 is 97208731.

13780279 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (13780297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13780279 - 2⁹ = 13779767 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13780219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6890139 + 6890140.

It is an arithmetic number, because the mean of its divisors is an integer number (6890140).

Almost surely, 2^13780279 is an apocalyptic number.

13780279 is a deficient number, since it is larger than the sum of its proper divisors (1).

13780279 is an equidigital number, since it uses as much as digits as its factorization.

13780279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 13780279 is about 3712.1798178429. The cubic root of 13780279 is about 239.7467177482.

The spelling of 13780279 in words is "thirteen million, seven hundred eighty thousand, two hundred seventy-nine".