791617 has 4 divisors (see below), whose sum is σ = 799876. Its totient is φ = 783360.

The previous prime is 791599. The next prime is 791627. The reversal of 791617 is 716197.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 716197 = 23 ⋅31139.

It can be written as a sum of positive squares in 2 ways, for example, as 323761 + 467856 = 569^2 + 684^2 .

It is a cyclic number.

It is not a de Polignac number, because 791617 - 2⁷ = 791489 is a prime.

It is a Duffinian number.

791617 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (791627) 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, 3984 + ... + 4177.

It is an arithmetic number, because the mean of its divisors is an integer number (199969).

2⁷⁹¹⁶¹⁷ is an apocalyptic number.

It is an amenable number.

791617 is a deficient number, since it is larger than the sum of its proper divisors (8259).

791617 is an equidigital number, since it uses as much as digits as its factorization.

791617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8258.

The product of its digits is 2646, while the sum is 31.

The square root of 791617 is about 889.7286103077. The cubic root of 791617 is about 92.5063837815.

The spelling of 791617 in words is "seven hundred ninety-one thousand, six hundred seventeen".