989697888796989 has 32 divisors (see below), whose sum is σ = 1372507684314624. Its totient is φ = 633849722412480.

The previous prime is 989697888796949. The next prime is 989697888796999.

989697888796989 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 989697888796989 - 2⁷ = 989697888796861 is a prime.

It is a super-2 number, since 2×989697888796989² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989697888796949) 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, 121348714 + ... + 129247460.

It is an arithmetic number, because the mean of its divisors is an integer number (42890865134832).

Almost surely, 2^{989697888796989} is an apocalyptic number.

It is an amenable number.

989697888796989 is a deficient number, since it is larger than the sum of its proper divisors (382809795517635).

989697888796989 is a wasteful number, since it uses less digits than its factorization.

989697888796989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7914777.

The product of its digits is 30718752325632, while the sum is 120.

The spelling of 989697888796989 in words is "nine hundred eighty-nine trillion, six hundred ninety-seven billion, eight hundred eighty-eight million, seven hundred ninety-six thousand, nine hundred eighty-nine".