17383949749 has 2 divisors, whose sum is σ = 17383949750. Its totient is φ = 17383949748.

The previous prime is 17383949663. The next prime is 17383949761. The reversal of 17383949749 is 94794938371.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13045751524 + 4338198225 = 114218^2 + 65865^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17383949749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17383941749) 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, 8691974874 + 8691974875.

It is an arithmetic number, because the mean of its divisors is an integer number (8691974875).

Almost surely, 2^17383949749 is an apocalyptic number.

It is an amenable number.

17383949749 is a deficient number, since it is larger than the sum of its proper divisors (1).

17383949749 is an equidigital number, since it uses as much as digits as its factorization.

17383949749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41150592, while the sum is 64.

The spelling of 17383949749 in words is "seventeen billion, three hundred eighty-three million, nine hundred forty-nine thousand, seven hundred forty-nine".