989898765 has 16 divisors (see below), whose sum is σ = 1667198400. Its totient is φ = 500159232.

The previous prime is 989898739. The next prime is 989898781. The reversal of 989898765 is 567898989.

989898765 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is not a de Polignac number, because 989898765 - 2¹⁵ = 989865997 is a 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 989898765.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1736380 + ... + 1736949.

It is an arithmetic number, because the mean of its divisors is an integer number (104199900).

Almost surely, 2^989898765 is an apocalyptic number.

989898765 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

989898765 is a deficient number, since it is larger than the sum of its proper divisors (677299635).

989898765 is a wasteful number, since it uses less digits than its factorization.

989898765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3473356.

The product of its digits is 78382080, while the sum is 69.

The square root of 989898765 is about 31462.6566742225. The cubic root of 989898765 is about 996.6215203964.

The spelling of 989898765 in words is "nine hundred eighty-nine million, eight hundred ninety-eight thousand, seven hundred sixty-five".