279949 has 2 divisors, whose sum is σ = 279950. Its totient is φ = 279948.

The previous prime is 279941. The next prime is 279967. The reversal of 279949 is 949972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220900 + 59049 = 470^2 + 243^2 .

It is a cyclic number.

It is not a de Polignac number, because 279949 - 2³ = 279941 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (279941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139974 + 139975.

It is an arithmetic number, because the mean of its divisors is an integer number (139975).

2²⁷⁹⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

279949 is a deficient number, since it is larger than the sum of its proper divisors (1).

279949 is an equidigital number, since it uses as much as digits as its factorization.

279949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 40.

The square root of 279949 is about 529.1020695480. The cubic root of 279949 is about 65.4173539535.

The spelling of 279949 in words is "two hundred seventy-nine thousand, nine hundred forty-nine".