18079091 has 2 divisors, whose sum is σ = 18079092. Its totient is φ = 18079090.

The previous prime is 18079057. The next prime is 18079099. The reversal of 18079091 is 19097081.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18079091 - 2¹⁸ = 17816947 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18079099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9039545 + 9039546.

It is an arithmetic number, because the mean of its divisors is an integer number (9039546).

Almost surely, 2^18079091 is an apocalyptic number.

18079091 is a deficient number, since it is larger than the sum of its proper divisors (1).

18079091 is an equidigital number, since it uses as much as digits as its factorization.

18079091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 35.

The square root of 18079091 is about 4251.9514343416. The cubic root of 18079091 is about 262.4574249923.

The spelling of 18079091 in words is "eighteen million, seventy-nine thousand, ninety-one".