18427879 has 2 divisors, whose sum is σ = 18427880. Its totient is φ = 18427878.

The previous prime is 18427831. The next prime is 18427897. The reversal of 18427879 is 97872481.

Together with next prime (18427897) 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 18427879 - 2⁷ = 18427751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18427379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9213939 + 9213940.

It is an arithmetic number, because the mean of its divisors is an integer number (9213940).

Almost surely, 2^18427879 is an apocalyptic number.

18427879 is a deficient number, since it is larger than the sum of its proper divisors (1).

18427879 is an equidigital number, since it uses as much as digits as its factorization.

18427879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 46.

The square root of 18427879 is about 4292.7705505885. The cubic root of 18427879 is about 264.1344920406.

It can be divided in two parts, 18427 and 879, that added together give a triangular number (19306 = T₁₉₆).

The spelling of 18427879 in words is "eighteen million, four hundred twenty-seven thousand, eight hundred seventy-nine".