189943431323 has 12 divisors (see below), whose sum is σ = 205081604592. Its totient is φ = 175839611520.

The previous prime is 189943431317. The next prime is 189943431367. The reversal of 189943431323 is 323134349981.

It is not a de Polignac number, because 189943431323 - 2⁶ = 189943431259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189943431383) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5369615 + ... + 5404872.

It is an arithmetic number, because the mean of its divisors is an integer number (17090133716).

Almost surely, 2^189943431323 is an apocalyptic number.

189943431323 is a deficient number, since it is larger than the sum of its proper divisors (15138173269).

189943431323 is a wasteful number, since it uses less digits than its factorization.

189943431323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10774582 (or 10774565 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 50.

The spelling of 189943431323 in words is "one hundred eighty-nine billion, nine hundred forty-three million, four hundred thirty-one thousand, three hundred twenty-three".