840132791 has 8 divisors (see below), whose sum is σ = 847699968. Its totient is φ = 832599000.

The previous prime is 840132781. The next prime is 840132793. The reversal of 840132791 is 197231048.

840132791 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-840132791 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 (840132793) 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, 43646 + ... + 59876.

It is an arithmetic number, because the mean of its divisors is an integer number (105962496).

Almost surely, 2^840132791 is an apocalyptic number.

840132791 is a deficient number, since it is larger than the sum of its proper divisors (7567177).

840132791 is a wasteful number, since it uses less digits than its factorization.

840132791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16693.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 840132791 is about 28985.0442642408. The cubic root of 840132791 is about 943.5885130707.

The spelling of 840132791 in words is "eight hundred forty million, one hundred thirty-two thousand, seven hundred ninety-one".