989810977 has 8 divisors (see below), whose sum is σ = 1024323840. Its totient is φ = 955323600.

The previous prime is 989810951. The next prime is 989810981. The reversal of 989810977 is 779018989.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 989810977 - 2⁷ = 989810849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (989813977) 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 in 7 ways as a sum of consecutive naturals, for example, 107248 + ... + 116110.

It is an arithmetic number, because the mean of its divisors is an integer number (128040480).

Almost surely, 2^989810977 is an apocalyptic number.

It is an amenable number.

989810977 is a deficient number, since it is larger than the sum of its proper divisors (34512863).

989810977 is a wasteful number, since it uses less digits than its factorization.

989810977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12743.

The product of its (nonzero) digits is 2286144, while the sum is 58.

The square root of 989810977 is about 31461.2615290614. The cubic root of 989810977 is about 996.5920581255.

The spelling of 989810977 in words is "nine hundred eighty-nine million, eight hundred ten thousand, nine hundred seventy-seven".