18168497 has 4 divisors (see below), whose sum is σ = 18203760. Its totient is φ = 18133236.

The previous prime is 18168487. The next prime is 18168523. The reversal of 18168497 is 79486181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18168497 - 2⁴ = 18168481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18168467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16847 + ... + 17892.

It is an arithmetic number, because the mean of its divisors is an integer number (4550940).

Almost surely, 2^18168497 is an apocalyptic number.

It is an amenable number.

18168497 is a deficient number, since it is larger than the sum of its proper divisors (35263).

18168497 is an equidigital number, since it uses as much as digits as its factorization.

18168497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35262.

The product of its digits is 96768, while the sum is 44.

The square root of 18168497 is about 4262.4519938646. The cubic root of 18168497 is about 262.8893547790.

The spelling of 18168497 in words is "eighteen million, one hundred sixty-eight thousand, four hundred ninety-seven".