279913 has 2 divisors, whose sum is σ = 279914. Its totient is φ = 279912.

The previous prime is 279883. The next prime is 279919. The reversal of 279913 is 319972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 243049 + 36864 = 493^2 + 192^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-279913 is a prime.

It is a plaindrome in base 16.

It is a nialpdrome in base 6.

It is not a weakly prime, because it can be changed into another prime (279919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139956 + 139957.

It is an arithmetic number, because the mean of its divisors is an integer number (139957).

2²⁷⁹⁹¹³ is an apocalyptic number.

It is an amenable number.

279913 is a deficient number, since it is larger than the sum of its proper divisors (1).

279913 is an equidigital number, since it uses as much as digits as its factorization.

279913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3402, while the sum is 31.

The square root of 279913 is about 529.0680485533. The cubic root of 279913 is about 65.4145497217.

The spelling of 279913 in words is "two hundred seventy-nine thousand, nine hundred thirteen".