2778297 has 4 divisors (see below), whose sum is σ = 3704400. Its totient is φ = 1852196.

The previous prime is 2778277. The next prime is 2778299. The reversal of 2778297 is 7928772.

2778297 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.

It is a cyclic number.

It is not a de Polignac number, because 2778297 - 2⁶ = 2778233 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (2778299) 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, 463047 + ... + 463052.

It is an arithmetic number, because the mean of its divisors is an integer number (926100).

2^2778297 is an apocalyptic number.

It is an amenable number.

2778297 is a deficient number, since it is larger than the sum of its proper divisors (926103).

2778297 is an equidigital number, since it uses as much as digits as its factorization.

2778297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926102.

The product of its digits is 98784, while the sum is 42.

The square root of 2778297 is about 1666.8224260550. The cubic root of 2778297 is about 140.5808689176.

The spelling of 2778297 in words is "two million, seven hundred seventy-eight thousand, two hundred ninety-seven".