17939703877 has 2 divisors, whose sum is σ = 17939703878. Its totient is φ = 17939703876.

The previous prime is 17939703871. The next prime is 17939703893. The reversal of 17939703877 is 77830793971.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17926264321 + 13439556 = 133889^2 + 3666^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17939703877 is a prime.

It is a super-5 number, since 5×17939703877⁵ (a number of 52 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17939703871) 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, 8969851938 + 8969851939.

It is an arithmetic number, because the mean of its divisors is an integer number (8969851939).

Almost surely, 2^17939703877 is an apocalyptic number.

It is an amenable number.

17939703877 is a deficient number, since it is larger than the sum of its proper divisors (1).

17939703877 is an equidigital number, since it uses as much as digits as its factorization.

17939703877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14002632, while the sum is 61.

The spelling of 17939703877 in words is "seventeen billion, nine hundred thirty-nine million, seven hundred three thousand, eight hundred seventy-seven".