279423121 has 2 divisors, whose sum is σ = 279423122. Its totient is φ = 279423120.

The previous prime is 279423107. The next prime is 279423143. The reversal of 279423121 is 121324972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207360000 + 72063121 = 14400^2 + 8489^2 .

It is a cyclic number.

It is not a de Polignac number, because 279423121 - 2⁹ = 279422609 is a prime.

It is not a weakly prime, because it can be changed into another prime (279423161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139711560 + 139711561.

It is an arithmetic number, because the mean of its divisors is an integer number (139711561).

Almost surely, 2^279423121 is an apocalyptic number.

It is an amenable number.

279423121 is a deficient number, since it is larger than the sum of its proper divisors (1).

279423121 is an equidigital number, since it uses as much as digits as its factorization.

279423121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 279423121 is about 16715.9540858427. The cubic root of 279423121 is about 653.7636651636.

The spelling of 279423121 in words is "two hundred seventy-nine million, four hundred twenty-three thousand, one hundred twenty-one".