18379279 has 2 divisors, whose sum is σ = 18379280. Its totient is φ = 18379278.

The previous prime is 18379247. The next prime is 18379297. The reversal of 18379279 is 97297381.

It is a happy number.

Together with next prime (18379297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18379279 - 2⁵ = 18379247 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18379219) 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 as a sum of consecutive naturals, namely, 9189639 + 9189640.

It is an arithmetic number, because the mean of its divisors is an integer number (9189640).

Almost surely, 2^18379279 is an apocalyptic number.

18379279 is a deficient number, since it is larger than the sum of its proper divisors (1).

18379279 is an equidigital number, since it uses as much as digits as its factorization.

18379279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 46.

The square root of 18379279 is about 4287.1061335124. The cubic root of 18379279 is about 263.9020862410.

The spelling of 18379279 in words is "eighteen million, three hundred seventy-nine thousand, two hundred seventy-nine".