2091117 has 8 divisors (see below), whose sum is σ = 3186496. Its totient is φ = 1194912.

The previous prime is 2091097. The next prime is 2091139. The reversal of 2091117 is 7111902.

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

It is not a de Polignac number, because 2091117 - 2⁶ = 2091053 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 99577 = 2091117 / (2 + 0 + 9 + 1 + 1 + 1 + 7).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2091093 and 2091102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091317) 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, 49768 + ... + 49809.

It is an arithmetic number, because the mean of its divisors is an integer number (398312).

2^2091117 is an apocalyptic number.

It is an amenable number.

2091117 is a deficient number, since it is larger than the sum of its proper divisors (1095379).

2091117 is an equidigital number, since it uses as much as digits as its factorization.

2091117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99587.

The product of its (nonzero) digits is 126, while the sum is 21.

The square root of 2091117 is about 1446.0695004045. The cubic root of 2091117 is about 127.8770996446.

It can be divided in two parts, 209 and 1117, that added together give a triangular number (1326 = T₅₁).

The spelling of 2091117 in words is "two million, ninety-one thousand, one hundred seventeen".