279001139 has 4 divisors (see below), whose sum is σ = 279056856. Its totient is φ = 278945424.

The previous prime is 279001133. The next prime is 279001153. The reversal of 279001139 is 931100972.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 279001139 - 2⁴ = 279001123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (279001133) 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 in 3 ways as a sum of consecutive naturals, for example, 19514 + ... + 30639.

It is an arithmetic number, because the mean of its divisors is an integer number (69764214).

Almost surely, 2^279001139 is an apocalyptic number.

279001139 is a deficient number, since it is larger than the sum of its proper divisors (55717).

279001139 is an equidigital number, since it uses as much as digits as its factorization.

279001139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55716.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 279001139 is about 16703.3271835284. The cubic root of 279001139 is about 653.4343969080.

The spelling of 279001139 in words is "two hundred seventy-nine million, one thousand, one hundred thirty-nine".