2978819 has 2 divisors, whose sum is σ = 2978820. Its totient is φ = 2978818.

The previous prime is 2978797. The next prime is 2978869. The reversal of 2978819 is 9188792.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2978819 - 2¹² = 2974723 is a prime.

It is a super-2 number, since 2×2978819² = 17746725269522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2978819.

It is not a weakly prime, because it can be changed into another prime (2978869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1489409 + 1489410.

It is an arithmetic number, because the mean of its divisors is an integer number (1489410).

2^2978819 is an apocalyptic number.

2978819 is a deficient number, since it is larger than the sum of its proper divisors (1).

2978819 is an equidigital number, since it uses as much as digits as its factorization.

2978819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 44.

The square root of 2978819 is about 1725.9255487998. The cubic root of 2978819 is about 143.8847296399.

The spelling of 2978819 in words is "two million, nine hundred seventy-eight thousand, eight hundred nineteen".