2978366887 has 2 divisors, whose sum is σ = 2978366888. Its totient is φ = 2978366886.

The previous prime is 2978366863. The next prime is 2978366971. The reversal of 2978366887 is 7886638792.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2978366887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2978366687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1489183443 + 1489183444.

It is an arithmetic number, because the mean of its divisors is an integer number (1489183444).

Almost surely, 2^2978366887 is an apocalyptic number.

2978366887 is a deficient number, since it is larger than the sum of its proper divisors (1).

2978366887 is an equidigital number, since it uses as much as digits as its factorization.

2978366887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48771072, while the sum is 64.

The square root of 2978366887 is about 54574.4160481814. The cubic root of 2978366887 is about 1438.7744985906.

The spelling of 2978366887 in words is "two billion, nine hundred seventy-eight million, three hundred sixty-six thousand, eight hundred eighty-seven".