279000121 has 8 divisors (see below), whose sum is σ = 286209000. Its totient is φ = 271810560.

The previous prime is 279000119. The next prime is 279000149. The reversal of 279000121 is 121000972.

It can be written as a sum of positive squares in 4 ways, for example, as 26666896 + 252333225 = 5164^2 + 15885^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 279000121 - 2¹ = 279000119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 279000092 and 279000101.

It is not an unprimeable number, because it can be changed into a prime (279000151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27105 + ... + 35953.

It is an arithmetic number, because the mean of its divisors is an integer number (35776125).

Almost surely, 2^279000121 is an apocalyptic number.

It is an amenable number.

279000121 is a deficient number, since it is larger than the sum of its proper divisors (7208879).

279000121 is an equidigital number, since it uses as much as digits as its factorization.

279000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9659.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 279000121 is about 16703.2967105299. The cubic root of 279000121 is about 653.4336021717.

The spelling of 279000121 in words is "two hundred seventy-nine million, one hundred twenty-one", and thus it is an aban number.