2781897 has 8 divisors (see below), whose sum is σ = 3927456. Its totient is φ = 1745472.

The previous prime is 2781887. The next prime is 2781901. The reversal of 2781897 is 7981872.

2781897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2781897 - 2¹⁰ = 2780873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2781817) 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 7 ways as a sum of consecutive naturals, for example, 27223 + ... + 27324.

It is an arithmetic number, because the mean of its divisors is an integer number (490932).

2^2781897 is an apocalyptic number.

It is an amenable number.

2781897 is a deficient number, since it is larger than the sum of its proper divisors (1145559).

2781897 is a wasteful number, since it uses less digits than its factorization.

2781897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54567.

The product of its digits is 56448, while the sum is 42.

The square root of 2781897 is about 1667.9019755369. The cubic root of 2781897 is about 140.6415622962.

The spelling of 2781897 in words is "two million, seven hundred eighty-one thousand, eight hundred ninety-seven".