279914987 has 6 divisors (see below), whose sum is σ = 307675284. Its totient is φ = 254468060.

The previous prime is 279914981. The next prime is 279915001. The reversal of 279914987 is 789419972.

It is a de Polignac number, because none of the positive numbers 2^k-279914987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (279914981) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1156553 + ... + 1156794.

It is an arithmetic number, because the mean of its divisors is an integer number (51279214).

Almost surely, 2^279914987 is an apocalyptic number.

279914987 is a deficient number, since it is larger than the sum of its proper divisors (27760297).

279914987 is a wasteful number, since it uses less digits than its factorization.

279914987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2313369 (or 2313358 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 56.

The square root of 279914987 is about 16730.6600885918. The cubic root of 279914987 is about 654.1470450595.

The spelling of 279914987 in words is "two hundred seventy-nine million, nine hundred fourteen thousand, nine hundred eighty-seven".