17309931949 has 2 divisors, whose sum is σ = 17309931950. Its totient is φ = 17309931948.

The previous prime is 17309931883. The next prime is 17309931971. The reversal of 17309931949 is 94913990371.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17237851849 + 72080100 = 131293^2 + 8490^2 .

It is a cyclic number.

It is not a de Polignac number, because 17309931949 - 2²⁹ = 16773061037 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 17309931949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17309971949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8654965974 + 8654965975.

It is an arithmetic number, because the mean of its divisors is an integer number (8654965975).

Almost surely, 2^17309931949 is an apocalyptic number.

It is an amenable number.

17309931949 is a deficient number, since it is larger than the sum of its proper divisors (1).

17309931949 is an equidigital number, since it uses as much as digits as its factorization.

17309931949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1653372, while the sum is 55.

The spelling of 17309931949 in words is "seventeen billion, three hundred nine million, nine hundred thirty-one thousand, nine hundred forty-nine".