18597697 has 2 divisors, whose sum is σ = 18597698. Its totient is φ = 18597696.

The previous prime is 18597661. The next prime is 18597703. The reversal of 18597697 is 79679581.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14107536 + 4490161 = 3756^2 + 2119^2 .

It is an emirp because it is prime and its reverse (79679581) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18597697 - 2¹⁵ = 18564929 is a prime.

It is not a weakly prime, because it can be changed into another prime (18597617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9298848 + 9298849.

It is an arithmetic number, because the mean of its divisors is an integer number (9298849).

Almost surely, 2^18597697 is an apocalyptic number.

It is an amenable number.

18597697 is a deficient number, since it is larger than the sum of its proper divisors (1).

18597697 is an equidigital number, since it uses as much as digits as its factorization.

18597697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 952560, while the sum is 52.

The square root of 18597697 is about 4312.5047246351. The cubic root of 18597697 is about 264.9433698856.

The spelling of 18597697 in words is "eighteen million, five hundred ninety-seven thousand, six hundred ninety-seven".