18102697 has 4 divisors (see below), whose sum is σ = 18113236. Its totient is φ = 18092160.

The previous prime is 18102691. The next prime is 18102701. The reversal of 18102697 is 79620181.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 6651241 + 11451456 = 2579^2 + 3384^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18102697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18102691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2028 + ... + 6349.

It is an arithmetic number, because the mean of its divisors is an integer number (4528309).

Almost surely, 2^18102697 is an apocalyptic number.

It is an amenable number.

18102697 is a deficient number, since it is larger than the sum of its proper divisors (10539).

18102697 is an equidigital number, since it uses as much as digits as its factorization.

18102697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10538.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 18102697 is about 4254.7264306886. The cubic root of 18102697 is about 262.5716061643.

The spelling of 18102697 in words is "eighteen million, one hundred two thousand, six hundred ninety-seven".