920091 has 8 divisors (see below), whose sum is σ = 1299024. Its totient is φ = 577280.

The previous prime is 920053. The next prime is 920107. The reversal of 920091 is 190029.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 920091 - 2¹⁰ = 919067 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 920091.

It is not an unprimeable number, because it can be changed into a prime (920011) 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, 8970 + ... + 9071.

It is an arithmetic number, because the mean of its divisors is an integer number (162378).

2⁹²⁰⁰⁹¹ is an apocalyptic number.

920091 is a deficient number, since it is larger than the sum of its proper divisors (378933).

920091 is a wasteful number, since it uses less digits than its factorization.

920091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18061.

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 920091 is about 959.2137405188. The cubic root of 920091 is about 97.2620892402.

It can be divided in two parts, 9 and 20091, that added together give a triangular number (20100 = T₂₀₀).

The spelling of 920091 in words is "nine hundred twenty thousand, ninety-one".