189523377917 has 4 divisors (see below), whose sum is σ = 189533847900. Its totient is φ = 189512907936.

The previous prime is 189523377907. The next prime is 189523377971. The reversal of 189523377917 is 719773325981.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34333866436 + 155189511481 = 185294^2 + 393941^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189523377917 is a prime.

It is a super-2 number, since 2×189523377917² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 189523377917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189523377907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5207792 + ... + 5244057.

It is an arithmetic number, because the mean of its divisors is an integer number (47383461975).

Almost surely, 2^189523377917 is an apocalyptic number.

It is an amenable number.

189523377917 is a deficient number, since it is larger than the sum of its proper divisors (10469983).

189523377917 is a wasteful number, since it uses less digits than its factorization.

189523377917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10469982.

The product of its digits is 20003760, while the sum is 62.

The spelling of 189523377917 in words is "one hundred eighty-nine billion, five hundred twenty-three million, three hundred seventy-seven thousand, nine hundred seventeen".