279551 has 2 divisors, whose sum is σ = 279552. Its totient is φ = 279550.

The previous prime is 279541. The next prime is 279553. The reversal of 279551 is 155972.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 279551 - 2¹⁴ = 263167 is a prime.

Together with 279553, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (279553) 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, 139775 + 139776.

It is an arithmetic number, because the mean of its divisors is an integer number (139776).

2²⁷⁹⁵⁵¹ is an apocalyptic number.

279551 is a deficient number, since it is larger than the sum of its proper divisors (1).

279551 is an equidigital number, since it uses as much as digits as its factorization.

279551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3150, while the sum is 29.

The square root of 279551 is about 528.7258268706. The cubic root of 279551 is about 65.3863382387.

The spelling of 279551 in words is "two hundred seventy-nine thousand, five hundred fifty-one".