279109 has 2 divisors, whose sum is σ = 279110. Its totient is φ = 279108.

The previous prime is 279073. The next prime is 279119. The reversal of 279109 is 901972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 228484 + 50625 = 478^2 + 225^2 .

It is a cyclic number.

It is not a de Polignac number, because 279109 - 2⁷ = 278981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (279119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139554 + 139555.

It is an arithmetic number, because the mean of its divisors is an integer number (139555).

2²⁷⁹¹⁰⁹ is an apocalyptic number.

It is an amenable number.

279109 is a deficient number, since it is larger than the sum of its proper divisors (1).

279109 is an equidigital number, since it uses as much as digits as its factorization.

279109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 279109 is about 528.3076755074. The cubic root of 279109 is about 65.3518591316.

The spelling of 279109 in words is "two hundred seventy-nine thousand, one hundred nine".