17068991 has 2 divisors, whose sum is σ = 17068992. Its totient is φ = 17068990.

The previous prime is 17068981. The next prime is 17069009. The reversal of 17068991 is 19986071.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17068991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17068981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8534495 + 8534496.

It is an arithmetic number, because the mean of its divisors is an integer number (8534496).

Almost surely, 2^17068991 is an apocalyptic number.

17068991 is a deficient number, since it is larger than the sum of its proper divisors (1).

17068991 is an equidigital number, since it uses as much as digits as its factorization.

17068991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 17068991 is about 4131.4635421361. The cubic root of 17068991 is about 257.4755234849.

The spelling of 17068991 in words is "seventeen million, sixty-eight thousand, nine hundred ninety-one".