17671497989 has 2 divisors, whose sum is σ = 17671497990. Its totient is φ = 17671497988.

The previous prime is 17671497983. The next prime is 17671497997. The reversal of 17671497989 is 98979417671.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17331722500 + 339775489 = 131650^2 + 18433^2 .

It is a cyclic number.

It is not a de Polignac number, because 17671497989 - 2¹² = 17671493893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17671497983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8835748994 + 8835748995.

It is an arithmetic number, because the mean of its divisors is an integer number (8835748995).

Almost surely, 2^17671497989 is an apocalyptic number.

It is an amenable number.

17671497989 is a deficient number, since it is larger than the sum of its proper divisors (1).

17671497989 is an equidigital number, since it uses as much as digits as its factorization.

17671497989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48009024, while the sum is 68.

The spelling of 17671497989 in words is "seventeen billion, six hundred seventy-one million, four hundred ninety-seven thousand, nine hundred eighty-nine".