279491 has 4 divisors (see below), whose sum is σ = 280800. Its totient is φ = 278184.

The previous prime is 279481. The next prime is 279511. The reversal of 279491 is 194972.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-279491 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 279491.

It is not an unprimeable number, because it can be changed into a prime (279421) 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, 251 + ... + 788.

It is an arithmetic number, because the mean of its divisors is an integer number (70200).

2²⁷⁹⁴⁹¹ is an apocalyptic number.

279491 is a deficient number, since it is larger than the sum of its proper divisors (1309).

279491 is a wasteful number, since it uses less digits than its factorization.

279491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308.

The product of its digits is 4536, while the sum is 32.

The square root of 279491 is about 528.6690836431. The cubic root of 279491 is about 65.3816599498.

The spelling of 279491 in words is "two hundred seventy-nine thousand, four hundred ninety-one".