920591 has 8 divisors (see below), whose sum is σ = 1057920. Its totient is φ = 784728.

The previous prime is 920561. The next prime is 920609. The reversal of 920591 is 195029.

It is a happy number.

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

It is not a de Polignac number, because 920591 - 2¹⁴ = 904207 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 920591.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 920591.

It is not an unprimeable number, because it can be changed into a prime (920561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2240 + ... + 2618.

It is an arithmetic number, because the mean of its divisors is an integer number (132240).

2⁹²⁰⁵⁹¹ is an apocalyptic number.

920591 is a deficient number, since it is larger than the sum of its proper divisors (137329).

920591 is a wasteful number, since it uses less digits than its factorization.

920591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 920591 is about 959.4743352482. The cubic root of 920591 is about 97.2797042508.

The spelling of 920591 in words is "nine hundred twenty thousand, five hundred ninety-one".