2091783 has 4 divisors (see below), whose sum is σ = 2789048. Its totient is φ = 1394520.

The previous prime is 2091773. The next prime is 2091797. The reversal of 2091783 is 3871902.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2091783 - 2¹³ = 2083591 is a prime.

It is a super-2 number, since 2×2091783² = 8751112238178, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2091783.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091703) 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, 348628 + ... + 348633.

It is an arithmetic number, because the mean of its divisors is an integer number (697262).

2^2091783 is an apocalyptic number.

2091783 is a deficient number, since it is larger than the sum of its proper divisors (697265).

2091783 is an equidigital number, since it uses as much as digits as its factorization.

2091783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697264.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 2091783 is about 1446.2997614603. The cubic root of 2091783 is about 127.8906740657.

The spelling of 2091783 in words is "two million, ninety-one thousand, seven hundred eighty-three".