18349249 has 2 divisors, whose sum is σ = 18349250. Its totient is φ = 18349248.

The previous prime is 18349229. The next prime is 18349277. The reversal of 18349249 is 94294381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11289600 + 7059649 = 3360^2 + 2657^2 .

It is an emirp because it is prime and its reverse (94294381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18349249 - 2⁵ = 18349217 is a prime.

It is not a weakly prime, because it can be changed into another prime (18349229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9174624 + 9174625.

It is an arithmetic number, because the mean of its divisors is an integer number (9174625).

Almost surely, 2^18349249 is an apocalyptic number.

It is an amenable number.

18349249 is a deficient number, since it is larger than the sum of its proper divisors (1).

18349249 is an equidigital number, since it uses as much as digits as its factorization.

18349249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 40.

The square root of 18349249 is about 4283.6023391533. The cubic root of 18349249 is about 263.7582775567.

The spelling of 18349249 in words is "eighteen million, three hundred forty-nine thousand, two hundred forty-nine".