279659 has 2 divisors, whose sum is σ = 279660. Its totient is φ = 279658.

The previous prime is 279649. The next prime is 279679. The reversal of 279659 is 956972.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-279659 is a prime.

It is a Sophie Germain prime.

It is a plaindrome in base 15 and base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 279659.

It is not a weakly prime, because it can be changed into another prime (279619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139829 + 139830.

It is an arithmetic number, because the mean of its divisors is an integer number (139830).

2²⁷⁹⁶⁵⁹ is an apocalyptic number.

279659 is a deficient number, since it is larger than the sum of its proper divisors (1).

279659 is an equidigital number, since it uses as much as digits as its factorization.

279659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34020, while the sum is 38.

The square root of 279659 is about 528.8279493370. The cubic root of 279659 is about 65.3947574721.

The spelling of 279659 in words is "two hundred seventy-nine thousand, six hundred fifty-nine".