18059617 has 2 divisors, whose sum is σ = 18059618. Its totient is φ = 18059616.

The previous prime is 18059579. The next prime is 18059621. The reversal of 18059617 is 71695081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10962721 + 7096896 = 3311^2 + 2664^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18059617 is a prime.

It is a super-2 number, since 2×18059617² = 652299532373378, which contains 22 as substring.

It is equal to p_1154899 and since 18059617 and 1154899 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (18059677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9029808 + 9029809.

It is an arithmetic number, because the mean of its divisors is an integer number (9029809).

Almost surely, 2^18059617 is an apocalyptic number.

It is an amenable number.

18059617 is a deficient number, since it is larger than the sum of its proper divisors (1).

18059617 is an equidigital number, since it uses as much as digits as its factorization.

18059617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 18059617 is about 4249.6608099941. The cubic root of 18059617 is about 262.3631552796.

The spelling of 18059617 in words is "eighteen million, fifty-nine thousand, six hundred seventeen".