279397 has 2 divisors, whose sum is σ = 279398. Its totient is φ = 279396.

The previous prime is 279353. The next prime is 279407. The reversal of 279397 is 793972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185761 + 93636 = 431^2 + 306^2 .

279397 is a truncatable prime.

It is a cyclic number.

It is not a de Polignac number, because 279397 - 2⁷ = 279269 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (279317) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139698 + 139699.

It is an arithmetic number, because the mean of its divisors is an integer number (139699).

2²⁷⁹³⁹⁷ is an apocalyptic number.

It is an amenable number.

279397 is a deficient number, since it is larger than the sum of its proper divisors (1).

279397 is an equidigital number, since it uses as much as digits as its factorization.

279397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23814, while the sum is 37.

The square root of 279397 is about 528.5801736728. The cubic root of 279397 is about 65.3743292842.

It can be divided in two parts, 279 and 397, that added together give a palindrome (676).

The spelling of 279397 in words is "two hundred seventy-nine thousand, three hundred ninety-seven".