989000777 has 2 divisors, whose sum is σ = 989000778. Its totient is φ = 989000776.

The previous prime is 989000773. The next prime is 989000783. The reversal of 989000777 is 777000989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 962488576 + 26512201 = 31024^2 + 5149^2 .

It is an emirp because it is prime and its reverse (777000989) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 989000777 - 2² = 989000773 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (989000773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494500388 + 494500389.

It is an arithmetic number, because the mean of its divisors is an integer number (494500389).

Almost surely, 2^989000777 is an apocalyptic number.

It is an amenable number.

989000777 is a deficient number, since it is larger than the sum of its proper divisors (1).

989000777 is an equidigital number, since it uses as much as digits as its factorization.

989000777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 222264, while the sum is 47.

The square root of 989000777 is about 31448.3827406116. The cubic root of 989000777 is about 996.3200670378.

The spelling of 989000777 in words is "nine hundred eighty-nine million, seven hundred seventy-seven", and thus it is an aban number.