2091499 has 4 divisors (see below), whose sum is σ = 2148064. Its totient is φ = 2034936.

The previous prime is 2091497. The next prime is 2091503. The reversal of 2091499 is 9941902.

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

It is a cyclic number.

It is not a de Polignac number, because 2091499 - 2¹ = 2091497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2091497) 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, 28227 + ... + 28300.

It is an arithmetic number, because the mean of its divisors is an integer number (537016).

2^2091499 is an apocalyptic number.

2091499 is a deficient number, since it is larger than the sum of its proper divisors (56565).

2091499 is an equidigital number, since it uses as much as digits as its factorization.

2091499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56564.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 2091499 is about 1446.2015765446. The cubic root of 2091499 is about 127.8848859262.

It can be divided in two parts, 20 and 91499, that added together give a palindrome (91519).

The spelling of 2091499 in words is "two million, ninety-one thousand, four hundred ninety-nine".