791391 has 8 divisors (see below), whose sum is σ = 1062784. Its totient is φ = 523800.

The previous prime is 791387. The next prime is 791411. The reversal of 791391 is 193197.

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

It is not a de Polignac number, because 791391 - 2² = 791387 is a prime.

It is a Duffinian number.

791391 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (791311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 421 + ... + 1326.

It is an arithmetic number, because the mean of its divisors is an integer number (132848).

2⁷⁹¹³⁹¹ is an apocalyptic number.

791391 is a deficient number, since it is larger than the sum of its proper divisors (271393).

791391 is a wasteful number, since it uses less digits than its factorization.

791391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1901.

The product of its digits is 1701, while the sum is 30.

The square root of 791391 is about 889.6015962216. The cubic root of 791391 is about 92.4975796786.

The spelling of 791391 in words is "seven hundred ninety-one thousand, three hundred ninety-one".