1717712981 has 2 divisors, whose sum is σ = 1717712982. Its totient is φ = 1717712980.

The previous prime is 1717712977. The next prime is 1717713017. The reversal of 1717712981 is 1892177171.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1709822500 + 7890481 = 41350^2 + 2809^2 .

It is a cyclic number.

It is not a de Polignac number, because 1717712981 - 2² = 1717712977 is a prime.

It is a super-2 number, since 2×1717712981² = 5901075770191812722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1717712911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 858856490 + 858856491.

It is an arithmetic number, because the mean of its divisors is an integer number (858856491).

Almost surely, 2^1717712981 is an apocalyptic number.

It is an amenable number.

1717712981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1717712981 is an equidigital number, since it uses as much as digits as its factorization.

1717712981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49392, while the sum is 44.

The square root of 1717712981 is about 41445.3010726186. The cubic root of 1717712981 is about 1197.6140046011.

The spelling of 1717712981 in words is "one billion, seven hundred seventeen million, seven hundred twelve thousand, nine hundred eighty-one".