279855229 has 2 divisors, whose sum is σ = 279855230. Its totient is φ = 279855228.

The previous prime is 279855193. The next prime is 279855239. The reversal of 279855229 is 922558972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 265755204 + 14100025 = 16302^2 + 3755^2 .

It is a cyclic number.

It is not a de Polignac number, because 279855229 - 2⁷ = 279855101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (279855239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139927614 + 139927615.

It is an arithmetic number, because the mean of its divisors is an integer number (139927615).

Almost surely, 2^279855229 is an apocalyptic number.

It is an amenable number.

279855229 is a deficient number, since it is larger than the sum of its proper divisors (1).

279855229 is an equidigital number, since it uses as much as digits as its factorization.

279855229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 907200, while the sum is 49.

The square root of 279855229 is about 16728.8741103518. The cubic root of 279855229 is about 654.1004912806.

The spelling of 279855229 in words is "two hundred seventy-nine million, eight hundred fifty-five thousand, two hundred twenty-nine".