2049691 has 16 divisors (see below), whose sum is σ = 2534400. Its totient is φ = 1618848.

The previous prime is 2049679. The next prime is 2049703. The reversal of 2049691 is 1969402.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2049679) and next prime (2049703).

It is not a de Polignac number, because 2049691 - 2⁵ = 2049659 is a prime.

It is a Duffinian number.

2049691 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2049611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4450 + ... + 4888.

It is an arithmetic number, because the mean of its divisors is an integer number (158400).

2^2049691 is an apocalyptic number.

2049691 is a deficient number, since it is larger than the sum of its proper divisors (484709).

2049691 is a wasteful number, since it uses less digits than its factorization.

2049691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 2049691 is about 1431.6741947804. The cubic root of 2049691 is about 127.0270263023.

The spelling of 2049691 in words is "two million, forty-nine thousand, six hundred ninety-one".