2091307 has 4 divisors (see below), whose sum is σ = 2099296. Its totient is φ = 2083320.

The previous prime is 2091301. The next prime is 2091317. The reversal of 2091307 is 7031902.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2091307 is a prime.

It is a Duffinian number.

2091307 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2091301) 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, 3588 + ... + 4129.

It is an arithmetic number, because the mean of its divisors is an integer number (524824).

2^2091307 is an apocalyptic number.

2091307 is a deficient number, since it is larger than the sum of its proper divisors (7989).

2091307 is an equidigital number, since it uses as much as digits as its factorization.

2091307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7988.

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 2091307 is about 1446.1351942332. The cubic root of 2091307 is about 127.8809725210.

The spelling of 2091307 in words is "two million, ninety-one thousand, three hundred seven".