189734519903 has 8 divisors (see below), whose sum is σ = 191698735536. Its totient is φ = 187771984000.

The previous prime is 189734519899. The next prime is 189734519927. The reversal of 189734519903 is 309915437981.

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

It is a cyclic number.

It is not a de Polignac number, because 189734519903 - 2² = 189734519899 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189734519203) 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, 192218 + ... + 645303.

It is an arithmetic number, because the mean of its divisors is an integer number (23962341942).

Almost surely, 2^189734519903 is an apocalyptic number.

189734519903 is a deficient number, since it is larger than the sum of its proper divisors (1964215633).

189734519903 is a wasteful number, since it uses less digits than its factorization.

189734519903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839865.

The product of its (nonzero) digits is 7348320, while the sum is 59.

The spelling of 189734519903 in words is "one hundred eighty-nine billion, seven hundred thirty-four million, five hundred nineteen thousand, nine hundred three".