989812147 has 2 divisors, whose sum is σ = 989812148. Its totient is φ = 989812146.

The previous prime is 989812129. The next prime is 989812211. The reversal of 989812147 is 741218989.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 989812147 - 2²⁷ = 855594419 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 989812147.

It is not a weakly prime, because it can be changed into another prime (989812127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494906073 + 494906074.

It is an arithmetic number, because the mean of its divisors is an integer number (494906074).

Almost surely, 2^989812147 is an apocalyptic number.

989812147 is a deficient number, since it is larger than the sum of its proper divisors (1).

989812147 is an equidigital number, since it uses as much as digits as its factorization.

989812147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 49.

The square root of 989812147 is about 31461.2801233516. The cubic root of 989812147 is about 996.5924507972.

The spelling of 989812147 in words is "nine hundred eighty-nine million, eight hundred twelve thousand, one hundred forty-seven".