840189371 has 4 divisors (see below), whose sum is σ = 960216432. Its totient is φ = 720162312.

The previous prime is 840189349. The next prime is 840189391. The reversal of 840189371 is 173981048.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 840189371 - 2¹⁰ = 840188347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (840189391) 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, 60013520 + ... + 60013533.

It is an arithmetic number, because the mean of its divisors is an integer number (240054108).

Almost surely, 2^840189371 is an apocalyptic number.

840189371 is a deficient number, since it is larger than the sum of its proper divisors (120027061).

840189371 is a wasteful number, since it uses less digits than its factorization.

840189371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120027060.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 840189371 is about 28986.0202683984. The cubic root of 840189371 is about 943.6096950553.

The spelling of 840189371 in words is "eight hundred forty million, one hundred eighty-nine thousand, three hundred seventy-one".