279594421 has 2 divisors, whose sum is σ = 279594422. Its totient is φ = 279594420.

The previous prime is 279594397. The next prime is 279594467. The reversal of 279594421 is 124495972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221682321 + 57912100 = 14889^2 + 7610^2 .

It is a cyclic number.

It is not a de Polignac number, because 279594421 - 2¹¹ = 279592373 is a prime.

It is a super-4 number, since 4×279594421⁴ (a number of 35 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (279597421) 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, 139797210 + 139797211.

It is an arithmetic number, because the mean of its divisors is an integer number (139797211).

Almost surely, 2^279594421 is an apocalyptic number.

It is an amenable number.

279594421 is a deficient number, since it is larger than the sum of its proper divisors (1).

279594421 is an equidigital number, since it uses as much as digits as its factorization.

279594421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 43.

The square root of 279594421 is about 16721.0771483179. The cubic root of 279594421 is about 653.8972342090.

The spelling of 279594421 in words is "two hundred seventy-nine million, five hundred ninety-four thousand, four hundred twenty-one".