17291993 has 2 divisors, whose sum is σ = 17291994. Its totient is φ = 17291992.

The previous prime is 17291969. The next prime is 17291999. The reversal of 17291993 is 39919271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9909904 + 7382089 = 3148^2 + 2717^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17291993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 17291993.

It is not a weakly prime, because it can be changed into another prime (17291999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8645996 + 8645997.

It is an arithmetic number, because the mean of its divisors is an integer number (8645997).

Almost surely, 2^17291993 is an apocalyptic number.

It is an amenable number.

17291993 is a deficient number, since it is larger than the sum of its proper divisors (1).

17291993 is an equidigital number, since it uses as much as digits as its factorization.

17291993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30618, while the sum is 41.

The square root of 17291993 is about 4158.3642216622. The cubic root of 17291993 is about 258.5919594704.

The spelling of 17291993 in words is "seventeen million, two hundred ninety-one thousand, nine hundred ninety-three".