279975361 has 2 divisors, whose sum is σ = 279975362. Its totient is φ = 279975360.

The previous prime is 279975313. The next prime is 279975383. The reversal of 279975361 is 163579972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170459136 + 109516225 = 13056^2 + 10465^2 .

It is a cyclic number.

It is not a de Polignac number, because 279975361 - 2²⁵ = 246420929 is a prime.

It is not a weakly prime, because it can be changed into another prime (279975301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139987680 + 139987681.

It is an arithmetic number, because the mean of its divisors is an integer number (139987681).

Almost surely, 2^279975361 is an apocalyptic number.

It is an amenable number.

279975361 is a deficient number, since it is larger than the sum of its proper divisors (1).

279975361 is an equidigital number, since it uses as much as digits as its factorization.

279975361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 714420, while the sum is 49.

The square root of 279975361 is about 16732.4642835417. The cubic root of 279975361 is about 654.1940719980.

The spelling of 279975361 in words is "two hundred seventy-nine million, nine hundred seventy-five thousand, three hundred sixty-one".