18283697 has 6 divisors (see below), whose sum is σ = 18565218. Its totient is φ = 18006384.

The previous prime is 18283693. The next prime is 18283703. The reversal of 18283697 is 79638281.

It can be written as a sum of positive squares in only one way, i.e., 12138256 + 6145441 = 3484^2 + 2479^2 .

It is not a de Polignac number, because 18283697 - 2² = 18283693 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18283693) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2453 + ... + 6525.

It is an arithmetic number, because the mean of its divisors is an integer number (3094203).

Almost surely, 2^18283697 is an apocalyptic number.

It is an amenable number.

18283697 is a deficient number, since it is larger than the sum of its proper divisors (281521).

18283697 is an frugal number, since it uses more digits than its factorization.

18283697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4207 (or 4140 counting only the distinct ones).

The product of its digits is 145152, while the sum is 44.

The square root of 18283697 is about 4275.9439893432. The cubic root of 18283697 is about 263.4438139561.

The spelling of 18283697 in words is "eighteen million, two hundred eighty-three thousand, six hundred ninety-seven".