2891149 has 4 divisors (see below), whose sum is σ = 2894560. Its totient is φ = 2887740.

The previous prime is 2891137. The next prime is 2891171. The reversal of 2891149 is 9411982.

2891149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2891149 - 2⁹ = 2890637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2891129) 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, 664 + ... + 2494.

It is an arithmetic number, because the mean of its divisors is an integer number (723640).

2^2891149 is an apocalyptic number.

It is an amenable number.

2891149 is a deficient number, since it is larger than the sum of its proper divisors (3411).

2891149 is a wasteful number, since it uses less digits than its factorization.

2891149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3410.

The product of its digits is 5184, while the sum is 34.

The square root of 2891149 is about 1700.3379075937. The cubic root of 2891149 is about 142.4590874649.

The spelling of 2891149 in words is "two million, eight hundred ninety-one thousand, one hundred forty-nine".