18007697 has 2 divisors, whose sum is σ = 18007698. Its totient is φ = 18007696.

The previous prime is 18007663. The next prime is 18007723. The reversal of 18007697 is 79670081.

It is a happy number.

18007697 is nontrivially palindromic in base 2.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14753281 + 3254416 = 3841^2 + 1804^2 .

It is a cyclic number.

It is not a de Polignac number, because 18007697 - 2¹⁰ = 18006673 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18007697.

It is not a weakly prime, because it can be changed into another prime (18004697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9003848 + 9003849.

It is an arithmetic number, because the mean of its divisors is an integer number (9003849).

Almost surely, 2^18007697 is an apocalyptic number.

It is an amenable number.

18007697 is a deficient number, since it is larger than the sum of its proper divisors (1).

18007697 is an equidigital number, since it uses as much as digits as its factorization.

18007697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 18007697 is about 4243.5476903176. The cubic root of 18007697 is about 262.1114893690. Note that the first 3 decimals are identical.

Multiplying 18007697 by its sum of digits (38), we get a palindrome (684292486).

The spelling of 18007697 in words is "eighteen million, seven thousand, six hundred ninety-seven".