18087079 has 2 divisors, whose sum is σ = 18087080. Its totient is φ = 18087078.

The previous prime is 18087061. The next prime is 18087101. The reversal of 18087079 is 97078081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18087079 - 2⁹ = 18086567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18087019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9043539 + 9043540.

It is an arithmetic number, because the mean of its divisors is an integer number (9043540).

Almost surely, 2^18087079 is an apocalyptic number.

18087079 is a deficient number, since it is larger than the sum of its proper divisors (1).

18087079 is an equidigital number, since it uses as much as digits as its factorization.

18087079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 40.

The square root of 18087079 is about 4252.8906640072. The cubic root of 18087079 is about 262.4960737130.

The spelling of 18087079 in words is "eighteen million, eighty-seven thousand, seventy-nine".