18097967 has 4 divisors (see below), whose sum is σ = 18258240. Its totient is φ = 17937696.

The previous prime is 18097931. The next prime is 18097991. The reversal of 18097967 is 76979081.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18097967 - 2⁶ = 18097903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18097927) 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, 79967 + ... + 80192.

It is an arithmetic number, because the mean of its divisors is an integer number (4564560).

Almost surely, 2^18097967 is an apocalyptic number.

18097967 is a deficient number, since it is larger than the sum of its proper divisors (160273).

18097967 is a wasteful number, since it uses less digits than its factorization.

18097967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160272.

The product of its (nonzero) digits is 190512, while the sum is 47.

The square root of 18097967 is about 4254.1705419506. The cubic root of 18097967 is about 262.5487353202.

The spelling of 18097967 in words is "eighteen million, ninety-seven thousand, nine hundred sixty-seven".