18146797 has 2 divisors, whose sum is σ = 18146798. Its totient is φ = 18146796.

The previous prime is 18146789. The next prime is 18146813. The reversal of 18146797 is 79764181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17547721 + 599076 = 4189^2 + 774^2 .

It is a cyclic number.

It is not a de Polignac number, because 18146797 - 2³ = 18146789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18146717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9073398 + 9073399.

It is an arithmetic number, because the mean of its divisors is an integer number (9073399).

Almost surely, 2^18146797 is an apocalyptic number.

It is an amenable number.

18146797 is a deficient number, since it is larger than the sum of its proper divisors (1).

18146797 is an equidigital number, since it uses as much as digits as its factorization.

18146797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 43.

The square root of 18146797 is about 4259.9057501311. The cubic root of 18146797 is about 262.7846502513.

The spelling of 18146797 in words is "eighteen million, one hundred forty-six thousand, seven hundred ninety-seven".