18145297 has 2 divisors, whose sum is σ = 18145298. Its totient is φ = 18145296.

The previous prime is 18145289. The next prime is 18145313. The reversal of 18145297 is 79254181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17943696 + 201601 = 4236^2 + 449^2 .

It is a cyclic number.

It is not a de Polignac number, because 18145297 - 2³ = 18145289 is a prime.

It is not a weakly prime, because it can be changed into another prime (18145277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9072648 + 9072649.

It is an arithmetic number, because the mean of its divisors is an integer number (9072649).

Almost surely, 2^18145297 is an apocalyptic number.

It is an amenable number.

18145297 is a deficient number, since it is larger than the sum of its proper divisors (1).

18145297 is an equidigital number, since it uses as much as digits as its factorization.

18145297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 37.

The square root of 18145297 is about 4259.7296862594. The cubic root of 18145297 is about 262.7774095275. Note that the first 3 decimals are identical.

The spelling of 18145297 in words is "eighteen million, one hundred forty-five thousand, two hundred ninety-seven".