279955 has 16 divisors (see below), whose sum is σ = 372960. Its totient is φ = 200448.

The previous prime is 279949. The next prime is 279967. The reversal of 279955 is 559972.

279955 = T₂₀₁ + T₂₀₂ + ... + T₂₁₃.

It is a cyclic number.

It is not a de Polignac number, because 279955 - 2⁹ = 279443 is a prime.

Its product of digits (28350) is a multiple of the sum of its prime divisors (150).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3799 + ... + 3871.

It is an arithmetic number, because the mean of its divisors is an integer number (23310).

2²⁷⁹⁹⁵⁵ is an apocalyptic number.

279955 is a deficient number, since it is larger than the sum of its proper divisors (93005).

279955 is a wasteful number, since it uses less digits than its factorization.

279955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150.

The product of its digits is 28350, while the sum is 37.

The square root of 279955 is about 529.1077395011. The cubic root of 279955 is about 65.4178213021.

The spelling of 279955 in words is "two hundred seventy-nine thousand, nine hundred fifty-five".