18616349 has 2 divisors, whose sum is σ = 18616350. Its totient is φ = 18616348.

The previous prime is 18616331. The next prime is 18616369. The reversal of 18616349 is 94361681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16605625 + 2010724 = 4075^2 + 1418^2 .

It is a cyclic number.

It is not a de Polignac number, because 18616349 - 2¹⁶ = 18550813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18616369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9308174 + 9308175.

It is an arithmetic number, because the mean of its divisors is an integer number (9308175).

Almost surely, 2^18616349 is an apocalyptic number.

It is an amenable number.

18616349 is a deficient number, since it is larger than the sum of its proper divisors (1).

18616349 is an equidigital number, since it uses as much as digits as its factorization.

18616349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 38.

The square root of 18616349 is about 4314.6667310466. Note that the first 3 decimals coincide. The cubic root of 18616349 is about 265.0319126158.

The spelling of 18616349 in words is "eighteen million, six hundred sixteen thousand, three hundred forty-nine".