279988663 has 2 divisors, whose sum is σ = 279988664. Its totient is φ = 279988662.

The previous prime is 279988661. The next prime is 279988697. The reversal of 279988663 is 366889972.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 279988663 - 2¹ = 279988661 is a prime.

Together with 279988661, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 279988598 and 279988607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (279988661) 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, 139994331 + 139994332.

It is an arithmetic number, because the mean of its divisors is an integer number (139994332).

Almost surely, 2^279988663 is an apocalyptic number.

279988663 is a deficient number, since it is larger than the sum of its proper divisors (1).

279988663 is an equidigital number, since it uses as much as digits as its factorization.

279988663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7838208, while the sum is 58.

The square root of 279988663 is about 16732.8617695838. The cubic root of 279988663 is about 654.2044323760.

The spelling of 279988663 in words is "two hundred seventy-nine million, nine hundred eighty-eight thousand, six hundred sixty-three".