791645 has 4 divisors (see below), whose sum is σ = 949980. Its totient is φ = 633312.

The previous prime is 791629. The next prime is 791657. The reversal of 791645 is 546197.

It is a happy number.

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 550564 + 241081 = 742^2 + 491^2 .

It is a cyclic number.

It is not a de Polignac number, because 791645 - 2⁴ = 791629 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79160 + ... + 79169.

It is an arithmetic number, because the mean of its divisors is an integer number (237495).

2⁷⁹¹⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

791645 is a deficient number, since it is larger than the sum of its proper divisors (158335).

791645 is a wasteful number, since it uses less digits than its factorization.

791645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158334.

The product of its digits is 7560, while the sum is 32.

The square root of 791645 is about 889.7443453038. The cubic root of 791645 is about 92.5074744386.

The spelling of 791645 in words is "seven hundred ninety-one thousand, six hundred forty-five".