2978897 has 4 divisors (see below), whose sum is σ = 2985456. Its totient is φ = 2972340.

The previous prime is 2978869. The next prime is 2978917. The reversal of 2978897 is 7988792.

It is a happy number.

2978897 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 a de Polignac number, because none of the positive numbers 2^k-2978897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2978197) 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, 2543 + ... + 3524.

It is an arithmetic number, because the mean of its divisors is an integer number (746364).

2^2978897 is an apocalyptic number.

It is an amenable number.

2978897 is a deficient number, since it is larger than the sum of its proper divisors (6559).

2978897 is an equidigital number, since it uses as much as digits as its factorization.

2978897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6558.

The product of its digits is 508032, while the sum is 50.

The square root of 2978897 is about 1725.9481452234. The cubic root of 2978897 is about 143.8859854967.

The spelling of 2978897 in words is "two million, nine hundred seventy-eight thousand, eight hundred ninety-seven".