2064691 has 4 divisors (see below), whose sum is σ = 2080584. Its totient is φ = 2048800.

The previous prime is 2064679. The next prime is 2064703. The reversal of 2064691 is 1964602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1964602 = 2 ⋅982301.

It is an interprime number because it is at equal distance from previous prime (2064679) and next prime (2064703).

It is a cyclic number.

It is not a de Polignac number, because 2064691 - 2¹⁹ = 1540403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2064611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7750 + ... + 8011.

It is an arithmetic number, because the mean of its divisors is an integer number (520146).

2^2064691 is an apocalyptic number.

2064691 is a deficient number, since it is larger than the sum of its proper divisors (15893).

2064691 is a wasteful number, since it uses less digits than its factorization.

2064691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15892.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 2064691 is about 1436.9032674470. The cubic root of 2064691 is about 127.3361421917.

The spelling of 2064691 in words is "two million, sixty-four thousand, six hundred ninety-one".