989707989 has 32 divisors (see below), whose sum is σ = 1418273280. Its totient is φ = 611712000.

The previous prime is 989707973. The next prime is 989708021.

989707989 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 989707989 - 2⁴ = 989707973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989705989) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1395567 + ... + 1396275.

It is an arithmetic number, because the mean of its divisors is an integer number (44321040).

Almost surely, 2^989707989 is an apocalyptic number.

It is an amenable number.

989707989 is a deficient number, since it is larger than the sum of its proper divisors (428565291).

989707989 is a wasteful number, since it uses less digits than its factorization.

989707989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101.

The product of its (nonzero) digits is 20575296, while the sum is 66.

The square root of 989707989 is about 31459.6247434708. The cubic root of 989707989 is about 996.5574924070.

The spelling of 989707989 in words is "nine hundred eighty-nine million, seven hundred seven thousand, nine hundred eighty-nine".