18441697 has 2 divisors, whose sum is σ = 18441698. Its totient is φ = 18441696.

The previous prime is 18441679. The next prime is 18441727. The reversal of 18441697 is 79614481.

Together with previous prime (18441679) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16128256 + 2313441 = 4016^2 + 1521^2 .

It is a cyclic number.

It is not a de Polignac number, because 18441697 - 2¹¹ = 18439649 is a prime.

It is not a weakly prime, because it can be changed into another prime (18441637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9220848 + 9220849.

It is an arithmetic number, because the mean of its divisors is an integer number (9220849).

Almost surely, 2^18441697 is an apocalyptic number.

It is an amenable number.

18441697 is a deficient number, since it is larger than the sum of its proper divisors (1).

18441697 is an equidigital number, since it uses as much as digits as its factorization.

18441697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 40.

The square root of 18441697 is about 4294.3796990951. The cubic root of 18441697 is about 264.2004952692.

The spelling of 18441697 in words is "eighteen million, four hundred forty-one thousand, six hundred ninety-seven".