279854949021 has 16 divisors (see below), whose sum is σ = 380321027136. Its totient is φ = 182982024576.

The previous prime is 279854948993. The next prime is 279854949029. The reversal of 279854949021 is 120949458972.

It is not a de Polignac number, because 279854949021 - 2¹⁰ = 279854947997 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (279854949029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106986 + ... + 755748.

It is an arithmetic number, because the mean of its divisors is an integer number (23770064196).

Almost surely, 2^279854949021 is an apocalyptic number.

It is an amenable number.

279854949021 is a deficient number, since it is larger than the sum of its proper divisors (100466078115).

279854949021 is a wasteful number, since it uses less digits than its factorization.

279854949021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651532.

The product of its (nonzero) digits is 13063680, while the sum is 60.

The spelling of 279854949021 in words is "two hundred seventy-nine billion, eight hundred fifty-four million, nine hundred forty-nine thousand, twenty-one".