2978869 has 2 divisors, whose sum is σ = 2978870. Its totient is φ = 2978868.

The previous prime is 2978819. The next prime is 2978917. The reversal of 2978869 is 9688792.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1656369 + 1322500 = 1287^2 + 1150^2 .

It is a cyclic number.

It is not a de Polignac number, because 2978869 - 2⁹ = 2978357 is a prime.

It is a super-2 number, since 2×2978869² = 17747321038322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2978819) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1489434 + 1489435.

It is an arithmetic number, because the mean of its divisors is an integer number (1489435).

2^2978869 is an apocalyptic number.

It is an amenable number.

2978869 is a deficient number, since it is larger than the sum of its proper divisors (1).

2978869 is an equidigital number, since it uses as much as digits as its factorization.

2978869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 49.

The square root of 2978869 is about 1725.9400337208. The cubic root of 2978869 is about 143.8855346789.

The spelling of 2978869 in words is "two million, nine hundred seventy-eight thousand, eight hundred sixty-nine".