17173901989 has 2 divisors, whose sum is σ = 17173901990. Its totient is φ = 17173901988.

The previous prime is 17173901971. The next prime is 17173902007. The reversal of 17173901989 is 98910937171.

It is a balanced prime because it is at equal distance from previous prime (17173901971) and next prime (17173902007).

It can be written as a sum of positive squares in only one way, i.e., 15980752225 + 1193149764 = 126415^2 + 34542^2 .

It is a cyclic number.

It is not a de Polignac number, because 17173901989 - 2⁵ = 17173901957 is a prime.

It is a super-2 number, since 2×17173901989² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17173901909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8586950994 + 8586950995.

It is an arithmetic number, because the mean of its divisors is an integer number (8586950995).

Almost surely, 2^17173901989 is an apocalyptic number.

It is an amenable number.

17173901989 is a deficient number, since it is larger than the sum of its proper divisors (1).

17173901989 is an equidigital number, since it uses as much as digits as its factorization.

17173901989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 857304, while the sum is 55.

The spelling of 17173901989 in words is "seventeen billion, one hundred seventy-three million, nine hundred one thousand, nine hundred eighty-nine".