279999345 has 8 divisors (see below), whose sum is σ = 447998976. Its totient is φ = 149332976.

The previous prime is 279999337. The next prime is 279999353. The reversal of 279999345 is 543999972.

It is an interprime number because it is at equal distance from previous prime (279999337) and next prime (279999353).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 279999345 - 2³ = 279999337 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9333297 + ... + 9333326.

It is an arithmetic number, because the mean of its divisors is an integer number (55999872).

Almost surely, 2^279999345 is an apocalyptic number.

It is an amenable number.

279999345 is a deficient number, since it is larger than the sum of its proper divisors (167999631).

279999345 is a wasteful number, since it uses less digits than its factorization.

279999345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18666631.

The product of its digits is 5511240, while the sum is 57.

The square root of 279999345 is about 16733.1809588016. The cubic root of 279999345 is about 654.2127519067.

The spelling of 279999345 in words is "two hundred seventy-nine million, nine hundred ninety-nine thousand, three hundred forty-five".