2978919 has 12 divisors (see below), whose sum is σ = 4352400. Its totient is φ = 1963104.

The previous prime is 2978917. The next prime is 2978923. The reversal of 2978919 is 9198792.

It is not a de Polignac number, because 2978919 - 2¹ = 2978917 is a prime.

It is a super-2 number, since 2×2978919² = 17747916817122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2978917) 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 11 ways as a sum of consecutive naturals, for example, 1059 + ... + 2660.

It is an arithmetic number, because the mean of its divisors is an integer number (362700).

2^2978919 is an apocalyptic number.

2978919 is a deficient number, since it is larger than the sum of its proper divisors (1373481).

2978919 is a wasteful number, since it uses less digits than its factorization.

2978919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3814 (or 3811 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The square root of 2978919 is about 1725.9545185201. The cubic root of 2978919 is about 143.8863397088.

It can be divided in two parts, 297 and 8919, that added together give a square (9216 = 96²).

The spelling of 2978919 in words is "two million, nine hundred seventy-eight thousand, nine hundred nineteen".