279910139 has 2 divisors, whose sum is σ = 279910140. Its totient is φ = 279910138.

The previous prime is 279910133. The next prime is 279910171. The reversal of 279910139 is 931019972.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-279910139 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 279910096 and 279910105.

It is not a weakly prime, because it can be changed into another prime (279910133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139955069 + 139955070.

It is an arithmetic number, because the mean of its divisors is an integer number (139955070).

Almost surely, 2^279910139 is an apocalyptic number.

279910139 is a deficient number, since it is larger than the sum of its proper divisors (1).

279910139 is an equidigital number, since it uses as much as digits as its factorization.

279910139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30618, while the sum is 41.

The square root of 279910139 is about 16730.5152042607. The cubic root of 279910139 is about 654.1432685281.

The spelling of 279910139 in words is "two hundred seventy-nine million, nine hundred ten thousand, one hundred thirty-nine".