18329197 has 4 divisors (see below), whose sum is σ = 18361980. Its totient is φ = 18296416.

The previous prime is 18329191. The next prime is 18329203. The reversal of 18329197 is 79192381.

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

It is an interprime number because it is at equal distance from previous prime (18329191) and next prime (18329203).

It can be written as a sum of positive squares in 2 ways, for example, as 10634121 + 7695076 = 3261^2 + 2774^2 .

It is a cyclic number.

It is not a de Polignac number, because 18329197 - 2¹⁵ = 18296429 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 (18329191) 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, 15538 + ... + 16675.

It is an arithmetic number, because the mean of its divisors is an integer number (4590495).

Almost surely, 2^18329197 is an apocalyptic number.

It is an amenable number.

18329197 is a deficient number, since it is larger than the sum of its proper divisors (32783).

18329197 is an equidigital number, since it uses as much as digits as its factorization.

18329197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32782.

The product of its digits is 27216, while the sum is 40.

The square root of 18329197 is about 4281.2611459709. The cubic root of 18329197 is about 263.6621644731.

The spelling of 18329197 in words is "eighteen million, three hundred twenty-nine thousand, one hundred ninety-seven".