279679013 has 2 divisors, whose sum is σ = 279679014. Its totient is φ = 279679012.

The previous prime is 279679007. The next prime is 279679063. The reversal of 279679013 is 310976972.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 279491524 + 187489 = 16718^2 + 433^2 .

It is a cyclic number.

It is not a de Polignac number, because 279679013 - 2¹⁴ = 279662629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (279679003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139839506 + 139839507.

It is an arithmetic number, because the mean of its divisors is an integer number (139839507).

Almost surely, 2^279679013 is an apocalyptic number.

It is an amenable number.

279679013 is a deficient number, since it is larger than the sum of its proper divisors (1).

279679013 is an equidigital number, since it uses as much as digits as its factorization.

279679013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 142884, while the sum is 44.

The square root of 279679013 is about 16723.6064591343. The cubic root of 279679013 is about 653.9631736473.

The spelling of 279679013 in words is "two hundred seventy-nine million, six hundred seventy-nine thousand, thirteen".