18609061 has 2 divisors, whose sum is σ = 18609062. Its totient is φ = 18609060.

The previous prime is 18609023. The next prime is 18609077. The reversal of 18609061 is 16090681.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15752961 + 2856100 = 3969^2 + 1690^2 .

It is a cyclic number.

It is not a de Polignac number, because 18609061 - 2¹⁷ = 18477989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18609361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9304530 + 9304531.

It is an arithmetic number, because the mean of its divisors is an integer number (9304531).

Almost surely, 2^18609061 is an apocalyptic number.

It is an amenable number.

18609061 is a deficient number, since it is larger than the sum of its proper divisors (1).

18609061 is an equidigital number, since it uses as much as digits as its factorization.

18609061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 18609061 is about 4313.8220871983. The cubic root of 18609061 is about 264.9973228637.

The spelling of 18609061 in words is "eighteen million, six hundred nine thousand, sixty-one".