18038597 has 2 divisors, whose sum is σ = 18038598. Its totient is φ = 18038596.

The previous prime is 18038593. The next prime is 18038651. The reversal of 18038597 is 79583081.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15319396 + 2719201 = 3914^2 + 1649^2 .

It is a cyclic number.

It is not a de Polignac number, because 18038597 - 2² = 18038593 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18038591) 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, 9019298 + 9019299.

It is an arithmetic number, because the mean of its divisors is an integer number (9019299).

Almost surely, 2^18038597 is an apocalyptic number.

It is an amenable number.

18038597 is a deficient number, since it is larger than the sum of its proper divisors (1).

18038597 is an equidigital number, since it uses as much as digits as its factorization.

18038597 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 18038597 is about 4247.1869513832. The cubic root of 18038597 is about 262.2613256093.

The spelling of 18038597 in words is "eighteen million, thirty-eight thousand, five hundred ninety-seven".