17912487017 has 2 divisors, whose sum is σ = 17912487018. Its totient is φ = 17912487016.

The previous prime is 17912486957. The next prime is 17912487029. The reversal of 17912487017 is 71078421971.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11276103721 + 6636383296 = 106189^2 + 81464^2 .

It is a cyclic number.

It is not a de Polignac number, because 17912487017 - 2²² = 17908292713 is a prime.

It is a super-2 number, since 2×17912487017² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (17912487067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8956243508 + 8956243509.

It is an arithmetic number, because the mean of its divisors is an integer number (8956243509).

Almost surely, 2^17912487017 is an apocalyptic number.

It is an amenable number.

17912487017 is a deficient number, since it is larger than the sum of its proper divisors (1).

17912487017 is an equidigital number, since it uses as much as digits as its factorization.

17912487017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 197568, while the sum is 47.

The spelling of 17912487017 in words is "seventeen billion, nine hundred twelve million, four hundred eighty-seven thousand, seventeen".