189948911017 has 2 divisors, whose sum is σ = 189948911018. Its totient is φ = 189948911016.

The previous prime is 189948910999. The next prime is 189948911041. The reversal of 189948911017 is 710119849981.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105069332736 + 84879578281 = 324144^2 + 291341^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189948911017 is a prime.

It is not a weakly prime, because it can be changed into another prime (189948911077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94974455508 + 94974455509.

It is an arithmetic number, because the mean of its divisors is an integer number (94974455509).

Almost surely, 2^189948911017 is an apocalyptic number.

It is an amenable number.

189948911017 is a deficient number, since it is larger than the sum of its proper divisors (1).

189948911017 is an equidigital number, since it uses as much as digits as its factorization.

189948911017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1306368, while the sum is 58.

The spelling of 189948911017 in words is "one hundred eighty-nine billion, nine hundred forty-eight million, nine hundred eleven thousand, seventeen".