189843487961 has 8 divisors (see below), whose sum is σ = 191303411904. Its totient is φ = 188383726960.

The previous prime is 189843487931. The next prime is 189843487969. The reversal of 189843487961 is 169784348981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189843487961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 189843487891 and 189843487900.

It is not an unprimeable number, because it can be changed into a prime (189843487969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3425276 + ... + 3480258.

It is an arithmetic number, because the mean of its divisors is an integer number (23912926488).

Almost surely, 2^189843487961 is an apocalyptic number.

It is an amenable number.

189843487961 is a deficient number, since it is larger than the sum of its proper divisors (1459923943).

189843487961 is a wasteful number, since it uses less digits than its factorization.

189843487961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81471.

The product of its digits is 83607552, while the sum is 68.

The spelling of 189843487961 in words is "one hundred eighty-nine billion, eight hundred forty-three million, four hundred eighty-seven thousand, nine hundred sixty-one".