279639379 has 2 divisors, whose sum is σ = 279639380. Its totient is φ = 279639378.

The previous prime is 279639361. The next prime is 279639383. The reversal of 279639379 is 973936972.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 279639379 - 2⁹ = 279638867 is a prime.

It is not a weakly prime, because it can be changed into another prime (279634379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139819689 + 139819690.

It is an arithmetic number, because the mean of its divisors is an integer number (139819690).

Almost surely, 2^279639379 is an apocalyptic number.

279639379 is a deficient number, since it is larger than the sum of its proper divisors (1).

279639379 is an equidigital number, since it uses as much as digits as its factorization.

279639379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3857868, while the sum is 55.

The square root of 279639379 is about 16722.4214454725. The cubic root of 279639379 is about 653.9322806120.

The spelling of 279639379 in words is "two hundred seventy-nine million, six hundred thirty-nine thousand, three hundred seventy-nine".