279897 has 8 divisors (see below), whose sum is σ = 378240. Its totient is φ = 184080.

The previous prime is 279883. The next prime is 279913. The reversal of 279897 is 798972.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 279897 - 2⁸ = 279641 is a prime.

It is a plaindrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 279897.

It is not an unprimeable number, because it can be changed into a prime (279817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 354 + ... + 827.

It is an arithmetic number, because the mean of its divisors is an integer number (47280).

2²⁷⁹⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

279897 is a deficient number, since it is larger than the sum of its proper divisors (98343).

279897 is a wasteful number, since it uses less digits than its factorization.

279897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263.

The product of its digits is 63504, while the sum is 42.

The square root of 279897 is about 529.0529274090. The cubic root of 279897 is about 65.4133033192.

It can be divided in two parts, 279 and 897, that added together give a triangular number (1176 = T₄₈).

The spelling of 279897 in words is "two hundred seventy-nine thousand, eight hundred ninety-seven".