791389 has 4 divisors (see below), whose sum is σ = 794524. Its totient is φ = 788256.

The previous prime is 791387. The next prime is 791411. The reversal of 791389 is 983197.

791389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 324900 + 466489 = 570^2 + 683^2 .

It is a cyclic number.

It is not a de Polignac number, because 791389 - 2¹ = 791387 is a prime.

It is a Duffinian number.

791389 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (791387) 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, 1152 + ... + 1705.

It is an arithmetic number, because the mean of its divisors is an integer number (198631).

2⁷⁹¹³⁸⁹ is an apocalyptic number.

It is an amenable number.

791389 is a deficient number, since it is larger than the sum of its proper divisors (3135).

791389 is a wasteful number, since it uses less digits than its factorization.

791389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3134.

The product of its digits is 13608, while the sum is 37.

The square root of 791389 is about 889.6004721222. The cubic root of 791389 is about 92.4975017587.

The spelling of 791389 in words is "seven hundred ninety-one thousand, three hundred eighty-nine".