189020717 has 2 divisors, whose sum is σ = 189020718. Its totient is φ = 189020716.

The previous prime is 189020659. The next prime is 189020723. The reversal of 189020717 is 717020981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183169156 + 5851561 = 13534^2 + 2419^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189020717 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189020017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94510358 + 94510359.

It is an arithmetic number, because the mean of its divisors is an integer number (94510359).

Almost surely, 2^189020717 is an apocalyptic number.

It is an amenable number.

189020717 is a deficient number, since it is larger than the sum of its proper divisors (1).

189020717 is an equidigital number, since it uses as much as digits as its factorization.

189020717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 35.

The square root of 189020717 is about 13748.4805342263. The cubic root of 189020717 is about 573.9003224229.

The spelling of 189020717 in words is "one hundred eighty-nine million, twenty thousand, seven hundred seventeen".