279485 has 4 divisors (see below), whose sum is σ = 335388. Its totient is φ = 223584.

The previous prime is 279481. The next prime is 279511. The reversal of 279485 is 584972.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 128164 + 151321 = 358^2 + 389^2 .

It is a cyclic number.

It is not a de Polignac number, because 279485 - 2² = 279481 is a prime.

It is a super-2 number, since 2×279485² = 156223730450, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2⁹ + 7⁵ + 4⁹ + 9 + 8 + 5 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (279481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27944 + ... + 27953.

It is an arithmetic number, because the mean of its divisors is an integer number (83847).

2²⁷⁹⁴⁸⁵ is an apocalyptic number.

It is an amenable number.

279485 is a deficient number, since it is larger than the sum of its proper divisors (55903).

279485 is an equidigital number, since it uses as much as digits as its factorization.

279485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55902.

The product of its digits is 20160, while the sum is 35.

The square root of 279485 is about 528.6634089853. The cubic root of 279485 is about 65.3811920841.

The spelling of 279485 in words is "two hundred seventy-nine thousand, four hundred eighty-five".