18059399 has 2 divisors, whose sum is σ = 18059400. Its totient is φ = 18059398.

The previous prime is 18059387. The next prime is 18059401. The reversal of 18059399 is 99395081.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18059399 - 2⁴ = 18059383 is a prime.

It is a super-2 number, since 2×18059399² = 652283784482402, which contains 22 as substring.

Together with 18059401, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18059339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9029699 + 9029700.

It is an arithmetic number, because the mean of its divisors is an integer number (9029700).

Almost surely, 2^18059399 is an apocalyptic number.

18059399 is a deficient number, since it is larger than the sum of its proper divisors (1).

18059399 is an equidigital number, since it uses as much as digits as its factorization.

18059399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 18059399 is about 4249.6351608109. The cubic root of 18059399 is about 262.3620996021.

The spelling of 18059399 in words is "eighteen million, fifty-nine thousand, three hundred ninety-nine".