18473297 has 2 divisors, whose sum is σ = 18473298. Its totient is φ = 18473296.

The previous prime is 18473233. The next prime is 18473317. The reversal of 18473297 is 79237481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16516096 + 1957201 = 4064^2 + 1399^2 .

It is an emirp because it is prime and its reverse (79237481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18473297 - 2⁶ = 18473233 is a prime.

It is not a weakly prime, because it can be changed into another prime (18473197) 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 as a sum of consecutive naturals, namely, 9236648 + 9236649.

It is an arithmetic number, because the mean of its divisors is an integer number (9236649).

Almost surely, 2^18473297 is an apocalyptic number.

It is an amenable number.

18473297 is a deficient number, since it is larger than the sum of its proper divisors (1).

18473297 is an equidigital number, since it uses as much as digits as its factorization.

18473297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 41.

The square root of 18473297 is about 4298.0573518742. The cubic root of 18473297 is about 264.3513124028.

The spelling of 18473297 in words is "eighteen million, four hundred seventy-three thousand, two hundred ninety-seven".