18598117 has 2 divisors, whose sum is σ = 18598118. Its totient is φ = 18598116.

The previous prime is 18598103. The next prime is 18598121. The reversal of 18598117 is 71189581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14791716 + 3806401 = 3846^2 + 1951^2 .

It is a cyclic number.

It is not a de Polignac number, because 18598117 - 2¹¹ = 18596069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18598117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18592117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9299058 + 9299059.

It is an arithmetic number, because the mean of its divisors is an integer number (9299059).

Almost surely, 2^18598117 is an apocalyptic number.

It is an amenable number.

18598117 is a deficient number, since it is larger than the sum of its proper divisors (1).

18598117 is an equidigital number, since it uses as much as digits as its factorization.

18598117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 40.

The square root of 18598117 is about 4312.5534199590. The cubic root of 18598117 is about 264.9453643149.

The spelling of 18598117 in words is "eighteen million, five hundred ninety-eight thousand, one hundred seventeen".