17983857149 has 2 divisors, whose sum is σ = 17983857150. Its totient is φ = 17983857148.

The previous prime is 17983857137. The next prime is 17983857161. The reversal of 17983857149 is 94175838971.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (17983857137) and next prime (17983857161).

It can be written as a sum of positive squares in only one way, i.e., 15716383225 + 2267473924 = 125365^2 + 47618^2 .

It is a cyclic number.

It is not a de Polignac number, because 17983857149 - 2⁸ = 17983856893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 17983857091 and 17983857100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17983857169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8991928574 + 8991928575.

It is an arithmetic number, because the mean of its divisors is an integer number (8991928575).

Almost surely, 2^17983857149 is an apocalyptic number.

It is an amenable number.

17983857149 is a deficient number, since it is larger than the sum of its proper divisors (1).

17983857149 is an equidigital number, since it uses as much as digits as its factorization.

17983857149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15240960, while the sum is 62.

The spelling of 17983857149 in words is "seventeen billion, nine hundred eighty-three million, eight hundred fifty-seven thousand, one hundred forty-nine".