279036254921 has 2 divisors, whose sum is σ = 279036254922. Its totient is φ = 279036254920.

The previous prime is 279036254821. The next prime is 279036254953. The reversal of 279036254921 is 129452630972.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 243517575625 + 35518679296 = 493475^2 + 188464^2 .

It is a cyclic number.

It is not a de Polignac number, because 279036254921 - 2³⁴ = 261856385737 is a prime.

It is a super-2 number, since 2×279036254921² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 279036254921.

It is not a weakly prime, because it can be changed into another prime (279036254621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139518127460 + 139518127461.

It is an arithmetic number, because the mean of its divisors is an integer number (139518127461).

Almost surely, 2^279036254921 is an apocalyptic number.

It is an amenable number.

279036254921 is a deficient number, since it is larger than the sum of its proper divisors (1).

279036254921 is an equidigital number, since it uses as much as digits as its factorization.

279036254921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1632960, while the sum is 50.

The spelling of 279036254921 in words is "two hundred seventy-nine billion, thirty-six million, two hundred fifty-four thousand, nine hundred twenty-one".