279964 has 6 divisors (see below), whose sum is σ = 489944. Its totient is φ = 139980.

The previous prime is 279949. The next prime is 279967. The reversal of 279964 is 469972.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (279967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34992 + ... + 34999.

279964 is a Friedman number, since it can be written as 6^7+(9+9-4)*2, using all its digits and the basic arithmetic operations.

2²⁷⁹⁹⁶⁴ is an apocalyptic number.

It is an amenable number.

279964 is a deficient number, since it is larger than the sum of its proper divisors (209980).

279964 is a wasteful number, since it uses less digits than its factorization.

279964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69995 (or 69993 counting only the distinct ones).

The product of its digits is 27216, while the sum is 37.

The square root of 279964 is about 529.1162443169. The cubic root of 279964 is about 65.4185223125.

The spelling of 279964 in words is "two hundred seventy-nine thousand, nine hundred sixty-four".