839049091 has 4 divisors (see below), whose sum is σ = 839793400. Its totient is φ = 838304784.

The previous prime is 839049061. The next prime is 839049097. The reversal of 839049091 is 190940938.

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 839049091 - 2²⁵ = 805494659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (839049097) 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, 370461 + ... + 372718.

It is an arithmetic number, because the mean of its divisors is an integer number (209948350).

Almost surely, 2^839049091 is an apocalyptic number.

839049091 is a deficient number, since it is larger than the sum of its proper divisors (744309).

839049091 is a wasteful number, since it uses less digits than its factorization.

839049091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744308.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 839049091 is about 28966.3441082923. The cubic root of 839049091 is about 943.1826221318.

The spelling of 839049091 in words is "eight hundred thirty-nine million, forty-nine thousand, ninety-one".