989088993 has 12 divisors (see below), whose sum is σ = 1477949460. Its totient is φ = 636654816.

The previous prime is 989088973. The next prime is 989089027. The reversal of 989088993 is 399880989.

It can be written as a sum of positive squares in 2 ways, for example, as 716739984 + 272349009 = 26772^2 + 16503^2 .

It is not a de Polignac number, because 989088993 - 2⁶ = 989088929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 989088993.

It is not an unprimeable number, because it can be changed into a prime (989088973) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1894546 + ... + 1895067.

It is an arithmetic number, because the mean of its divisors is an integer number (123162455).

Almost surely, 2^989088993 is an apocalyptic number.

It is an amenable number.

989088993 is a deficient number, since it is larger than the sum of its proper divisors (488860467).

989088993 is a wasteful number, since it uses less digits than its factorization.

989088993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3789648 (or 3789645 counting only the distinct ones).

The product of its (nonzero) digits is 10077696, while the sum is 63.

The square root of 989088993 is about 31449.7852615880. The cubic root of 989088993 is about 996.3496891103.

The spelling of 989088993 in words is "nine hundred eighty-nine million, eighty-eight thousand, nine hundred ninety-three".