2781097 has 4 divisors (see below), whose sum is σ = 3033936. Its totient is φ = 2528260.

The previous prime is 2781089. The next prime is 2781109. The reversal of 2781097 is 7901872.

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 2781097 - 2³ = 2781089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2781007) 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, 126403 + ... + 126424.

It is an arithmetic number, because the mean of its divisors is an integer number (758484).

2^2781097 is an apocalyptic number.

It is an amenable number.

2781097 is a deficient number, since it is larger than the sum of its proper divisors (252839).

2781097 is a wasteful number, since it uses less digits than its factorization.

2781097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252838.

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 2781097 is about 1667.6621360455. The cubic root of 2781097 is about 140.6280794058.

The spelling of 2781097 in words is "two million, seven hundred eighty-one thousand, ninety-seven".