18223297 has 2 divisors, whose sum is σ = 18223298. Its totient is φ = 18223296.

The previous prime is 18223273. The next prime is 18223307. The reversal of 18223297 is 79232281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9217296 + 9006001 = 3036^2 + 3001^2 .

It is a cyclic number.

It is not a de Polignac number, because 18223297 - 2²³ = 9834689 is a prime.

It is not a weakly prime, because it can be changed into another prime (18223267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9111648 + 9111649.

It is an arithmetic number, because the mean of its divisors is an integer number (9111649).

Almost surely, 2^18223297 is an apocalyptic number.

It is an amenable number.

18223297 is a deficient number, since it is larger than the sum of its proper divisors (1).

18223297 is an equidigital number, since it uses as much as digits as its factorization.

18223297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 34.

The square root of 18223297 is about 4268.8753788322. The cubic root of 18223297 is about 263.1533993078.

It can be divided in two parts, 182232 and 97, that added together give a square (182329 = 427²).

The spelling of 18223297 in words is "eighteen million, two hundred twenty-three thousand, two hundred ninety-seven".