189736404271 has 4 divisors (see below), whose sum is σ = 189738210672. Its totient is φ = 189734597872.

The previous prime is 189736404259. The next prime is 189736404349. The reversal of 189736404271 is 172404637981.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 172404637981 = 17 ⋅10141449293.

It is a cyclic number.

It is not a de Polignac number, because 189736404271 - 2¹¹ = 189736402223 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 (189736404971) 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, 735235 + ... + 959188.

It is an arithmetic number, because the mean of its divisors is an integer number (47434552668).

Almost surely, 2^189736404271 is an apocalyptic number.

189736404271 is a deficient number, since it is larger than the sum of its proper divisors (1806401).

189736404271 is a wasteful number, since it uses less digits than its factorization.

189736404271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1806400.

The product of its (nonzero) digits is 2032128, while the sum is 52.

The spelling of 189736404271 in words is "one hundred eighty-nine billion, seven hundred thirty-six million, four hundred four thousand, two hundred seventy-one".