18463897 has 2 divisors, whose sum is σ = 18463898. Its totient is φ = 18463896.

The previous prime is 18463889. The next prime is 18463909. The reversal of 18463897 is 79836481.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18455616 + 8281 = 4296^2 + 91^2 .

It is a cyclic number.

It is not a de Polignac number, because 18463897 - 2³ = 18463889 is a prime.

It is not a weakly prime, because it can be changed into another prime (18463847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9231948 + 9231949.

It is an arithmetic number, because the mean of its divisors is an integer number (9231949).

Almost surely, 2^18463897 is an apocalyptic number.

It is an amenable number.

18463897 is a deficient number, since it is larger than the sum of its proper divisors (1).

18463897 is an equidigital number, since it uses as much as digits as its factorization.

18463897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 46.

The square root of 18463897 is about 4296.9636954482. The cubic root of 18463897 is about 264.3064670615.

The spelling of 18463897 in words is "eighteen million, four hundred sixty-three thousand, eight hundred ninety-seven".