279523 has 2 divisors, whose sum is σ = 279524. Its totient is φ = 279522.

The previous prime is 279511. The next prime is 279541. The reversal of 279523 is 325972.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-279523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 279491 and 279500.

It is not a weakly prime, because it can be changed into another prime (279553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139761 + 139762.

It is an arithmetic number, because the mean of its divisors is an integer number (139762).

2²⁷⁹⁵²³ is an apocalyptic number.

279523 is a deficient number, since it is larger than the sum of its proper divisors (1).

279523 is an equidigital number, since it uses as much as digits as its factorization.

279523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780, while the sum is 28.

The square root of 279523 is about 528.6993474556. The cubic root of 279523 is about 65.3841551205.

The spelling of 279523 in words is "two hundred seventy-nine thousand, five hundred twenty-three".