18079489 has 2 divisors, whose sum is σ = 18079490. Its totient is φ = 18079488.

The previous prime is 18079463. The next prime is 18079493. The reversal of 18079489 is 98497081.

It is a happy number.

18079489 is nontrivially palindromic in base 8.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9199089 + 8880400 = 3033^2 + 2980^2 .

It is an emirp because it is prime and its reverse (98497081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18079489 - 2⁷ = 18079361 is a prime.

It is a super-2 number, since 2×18079489² = 653735845002242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18079459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9039744 + 9039745.

It is an arithmetic number, because the mean of its divisors is an integer number (9039745).

Almost surely, 2^18079489 is an apocalyptic number.

It is an amenable number.

18079489 is a deficient number, since it is larger than the sum of its proper divisors (1).

18079489 is an equidigital number, since it uses as much as digits as its factorization.

18079489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 18079489 is about 4251.9982361238. The cubic root of 18079489 is about 262.4593509241.

The spelling of 18079489 in words is "eighteen million, seventy-nine thousand, four hundred eighty-nine".