2778097 has 4 divisors (see below), whose sum is σ = 3174976. Its totient is φ = 2381220.

The previous prime is 2778091. The next prime is 2778107. The reversal of 2778097 is 7908772.

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 2778097 - 2⁷ = 2777969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2778091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198429 + ... + 198442.

It is an arithmetic number, because the mean of its divisors is an integer number (793744).

2^2778097 is an apocalyptic number.

It is an amenable number.

2778097 is a deficient number, since it is larger than the sum of its proper divisors (396879).

2778097 is an equidigital number, since it uses as much as digits as its factorization.

2778097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396878.

The product of its (nonzero) digits is 49392, while the sum is 40.

The square root of 2778097 is about 1666.7624305821. The cubic root of 2778097 is about 140.5774955264.

The spelling of 2778097 in words is "two million, seven hundred seventy-eight thousand, ninety-seven".