279479 has 2 divisors, whose sum is σ = 279480. Its totient is φ = 279478.

The previous prime is 279451. The next prime is 279481. The reversal of 279479 is 974972.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 279479 - 2¹⁶ = 213943 is a prime.

It is a super-2 number, since 2×279479² = 156217022882, which contains 22 as substring.

Together with 279481, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (279179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139739 + 139740.

It is an arithmetic number, because the mean of its divisors is an integer number (139740).

2²⁷⁹⁴⁷⁹ is an apocalyptic number.

279479 is a deficient number, since it is larger than the sum of its proper divisors (1).

279479 is an equidigital number, since it uses as much as digits as its factorization.

279479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31752, while the sum is 38.

The square root of 279479 is about 528.6577342667. The cubic root of 279479 is about 65.3807242117.

The spelling of 279479 in words is "two hundred seventy-nine thousand, four hundred seventy-nine".