8978994047 has 2 divisors, whose sum is σ = 8978994048. Its totient is φ = 8978994046.

The previous prime is 8978994043. The next prime is 8978994067. The reversal of 8978994047 is 7404998798.

8978994047 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8978994047 - 2² = 8978994043 is a prime.

It is a super-2 number, since 2×8978994047² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8978994041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4489497023 + 4489497024.

It is an arithmetic number, because the mean of its divisors is an integer number (4489497024).

Almost surely, 2^8978994047 is an apocalyptic number.

8978994047 is a deficient number, since it is larger than the sum of its proper divisors (1).

8978994047 is an equidigital number, since it uses as much as digits as its factorization.

8978994047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36578304, while the sum is 65.

The square root of 8978994047 is about 94757.5540366044. The cubic root of 8978994047 is about 2078.4642607875.

The spelling of 8978994047 in words is "eight billion, nine hundred seventy-eight million, nine hundred ninety-four thousand, forty-seven".