989178000647 has 2 divisors, whose sum is σ = 989178000648. Its totient is φ = 989178000646.

The previous prime is 989178000623. The next prime is 989178000787. The reversal of 989178000647 is 746000871989.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 989178000647 - 2¹⁶ = 989177935111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989178009647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494589000323 + 494589000324.

It is an arithmetic number, because the mean of its divisors is an integer number (494589000324).

Almost surely, 2^989178000647 is an apocalyptic number.

989178000647 is a deficient number, since it is larger than the sum of its proper divisors (1).

989178000647 is an equidigital number, since it uses as much as digits as its factorization.

989178000647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6096384, while the sum is 59.

The spelling of 989178000647 in words is "nine hundred eighty-nine billion, one hundred seventy-eight million, six hundred forty-seven", and thus it is an aban number.