189861303963 has 8 divisors (see below), whose sum is σ = 253380018448. Its totient is φ = 126458396064.

The previous prime is 189861303937. The next prime is 189861304019. The reversal of 189861303963 is 369303168981.

It is a happy number.

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

It is not a de Polignac number, because 189861303963 - 2⁹ = 189861303451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189861303913) 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, 28947820 + ... + 28954377.

It is an arithmetic number, because the mean of its divisors is an integer number (31672502306).

Almost surely, 2^189861303963 is an apocalyptic number.

189861303963 is a deficient number, since it is larger than the sum of its proper divisors (63518714485).

189861303963 is a wasteful number, since it uses less digits than its factorization.

189861303963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57903293.

The product of its (nonzero) digits is 5038848, while the sum is 57.

The spelling of 189861303963 in words is "one hundred eighty-nine billion, eight hundred sixty-one million, three hundred three thousand, nine hundred sixty-three".