279967 has 2 divisors, whose sum is σ = 279968. Its totient is φ = 279966.

The previous prime is 279949. The next prime is 279977. The reversal of 279967 is 769972.

It is a strong prime.

279967 is a truncatable prime.

It is a cyclic number.

It is not a de Polignac number, because 279967 - 2¹¹ = 277919 is a prime.

It is a Chen prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (279977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139983 + 139984.

It is an arithmetic number, because the mean of its divisors is an integer number (139984).

279967 is a Friedman number, since it can be written as 7^2-9-9+6^7, using all its digits and the basic arithmetic operations.

2²⁷⁹⁹⁶⁷ is an apocalyptic number.

279967 is a deficient number, since it is larger than the sum of its proper divisors (1).

279967 is an equidigital number, since it uses as much as digits as its factorization.

279967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47628, while the sum is 40.

The square root of 279967 is about 529.1190792251. The cubic root of 279967 is about 65.4187559793.

The spelling of 279967 in words is "two hundred seventy-nine thousand, nine hundred sixty-seven".