279953 has 4 divisors (see below), whose sum is σ = 283968. Its totient is φ = 275940.

The previous prime is 279949. The next prime is 279967. The reversal of 279953 is 359972.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 279953 - 2² = 279949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (279913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1901 + ... + 2042.

It is an arithmetic number, because the mean of its divisors is an integer number (70992).

2²⁷⁹⁹⁵³ is an apocalyptic number.

It is an amenable number.

279953 is a deficient number, since it is larger than the sum of its proper divisors (4015).

279953 is an equidigital number, since it uses as much as digits as its factorization.

279953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4014.

The product of its digits is 17010, while the sum is 35.

The square root of 279953 is about 529.1058495235. The cubic root of 279953 is about 65.4176655200.

The spelling of 279953 in words is "two hundred seventy-nine thousand, nine hundred fifty-three".