279289650889 has 2 divisors, whose sum is σ = 279289650890. Its totient is φ = 279289650888.

The previous prime is 279289650821. The next prime is 279289650901. The reversal of 279289650889 is 988056982972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157027535289 + 122262115600 = 396267^2 + 349660^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-279289650889 is a prime.

It is not a weakly prime, because it can be changed into another prime (279289650089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139644825444 + 139644825445.

It is an arithmetic number, because the mean of its divisors is an integer number (139644825445).

Almost surely, 2^279289650889 is an apocalyptic number.

It is an amenable number.

279289650889 is a deficient number, since it is larger than the sum of its proper divisors (1).

279289650889 is an equidigital number, since it uses as much as digits as its factorization.

279289650889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 313528320, while the sum is 73.

The spelling of 279289650889 in words is "two hundred seventy-nine billion, two hundred eighty-nine million, six hundred fifty thousand, eight hundred eighty-nine".