17298890981 has 2 divisors, whose sum is σ = 17298890982. Its totient is φ = 17298890980.

The previous prime is 17298890899. The next prime is 17298890989. The reversal of 17298890981 is 18909889271.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14488936900 + 2809954081 = 120370^2 + 53009^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17298890981 is a prime.

It is a super-2 number, since 2×17298890981² (a number of 21 digits) 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 (17298890989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8649445490 + 8649445491.

It is an arithmetic number, because the mean of its divisors is an integer number (8649445491).

Almost surely, 2^17298890981 is an apocalyptic number.

It is an amenable number.

17298890981 is a deficient number, since it is larger than the sum of its proper divisors (1).

17298890981 is an equidigital number, since it uses as much as digits as its factorization.

17298890981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5225472, while the sum is 62.

The spelling of 17298890981 in words is "seventeen billion, two hundred ninety-eight million, eight hundred ninety thousand, nine hundred eighty-one".