2978894089 has 2 divisors, whose sum is σ = 2978894090. Its totient is φ = 2978894088.

The previous prime is 2978894077. The next prime is 2978894143. The reversal of 2978894089 is 9804988792.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2703168064 + 275726025 = 51992^2 + 16605^2 .

It is a cyclic number.

It is not a de Polignac number, because 2978894089 - 2⁷ = 2978893961 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2978894089.

It is not a weakly prime, because it can be changed into another prime (2978894029) 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 as a sum of consecutive naturals, namely, 1489447044 + 1489447045.

It is an arithmetic number, because the mean of its divisors is an integer number (1489447045).

Almost surely, 2^2978894089 is an apocalyptic number.

It is an amenable number.

2978894089 is a deficient number, since it is larger than the sum of its proper divisors (1).

2978894089 is an equidigital number, since it uses as much as digits as its factorization.

2978894089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20901888, while the sum is 64.

The square root of 2978894089 is about 54579.2459548499. The cubic root of 2978894089 is about 1438.8593862792.

The spelling of 2978894089 in words is "two billion, nine hundred seventy-eight million, eight hundred ninety-four thousand, eighty-nine".