2891641 has 4 divisors (see below), whose sum is σ = 2904832. Its totient is φ = 2878452.

The previous prime is 2891639. The next prime is 2891657. The reversal of 2891641 is 1461982.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 2891641 - 2¹ = 2891639 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 (2891671) 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 3 ways as a sum of consecutive naturals, for example, 6261 + ... + 6706.

It is an arithmetic number, because the mean of its divisors is an integer number (726208).

2^2891641 is an apocalyptic number.

It is an amenable number.

2891641 is a deficient number, since it is larger than the sum of its proper divisors (13191).

2891641 is a wasteful number, since it uses less digits than its factorization.

2891641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13190.

The product of its digits is 3456, while the sum is 31.

The square root of 2891641 is about 1700.4825785641. The cubic root of 2891641 is about 142.4671679773.

The spelling of 2891641 in words is "two million, eight hundred ninety-one thousand, six hundred forty-one".