18417197 has 4 divisors (see below), whose sum is σ = 18432480. Its totient is φ = 18401916.

The previous prime is 18417173. The next prime is 18417247. The reversal of 18417197 is 79171481.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 79171481 = 139 ⋅569579.

It is a cyclic number.

It is not a de Polignac number, because 18417197 - 2⁸ = 18416941 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18417197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18417127) 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, 5663 + ... + 8300.

It is an arithmetic number, because the mean of its divisors is an integer number (4608120).

Almost surely, 2^18417197 is an apocalyptic number.

It is an amenable number.

18417197 is a deficient number, since it is larger than the sum of its proper divisors (15283).

18417197 is a wasteful number, since it uses less digits than its factorization.

18417197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15282.

The product of its digits is 14112, while the sum is 38.

The square root of 18417197 is about 4291.5261854030. The cubic root of 18417197 is about 264.0834456525.

The spelling of 18417197 in words is "eighteen million, four hundred seventeen thousand, one hundred ninety-seven".