18097679 has 4 divisors (see below), whose sum is σ = 18482784. Its totient is φ = 17712576.

The previous prime is 18097669. The next prime is 18097691. The reversal of 18097679 is 97679081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97679081 = 997 ⋅97973.

It is a cyclic number.

It is not a de Polignac number, because 18097679 - 2⁸ = 18097423 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 385057 = 18097679 / (1 + 8 + 0 + 9 + 7 + 6 + 7 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18097609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192482 + ... + 192575.

It is an arithmetic number, because the mean of its divisors is an integer number (4620696).

Almost surely, 2^18097679 is an apocalyptic number.

18097679 is a deficient number, since it is larger than the sum of its proper divisors (385105).

18097679 is an equidigital number, since it uses as much as digits as its factorization.

18097679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385104.

The product of its (nonzero) digits is 190512, while the sum is 47.

The square root of 18097679 is about 4254.1366926793. The cubic root of 18097679 is about 262.5473426327.

The spelling of 18097679 in words is "eighteen million, ninety-seven thousand, six hundred seventy-nine".