989088749 has 8 divisors (see below), whose sum is σ = 1079811648. Its totient is φ = 898500160.

The previous prime is 989088707. The next prime is 989088787. The reversal of 989088749 is 947880989.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-989088749 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 989088691 and 989088700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989088349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17852 + ... + 47925.

It is an arithmetic number, because the mean of its divisors is an integer number (134976456).

Almost surely, 2^989088749 is an apocalyptic number.

It is an amenable number.

989088749 is a deficient number, since it is larger than the sum of its proper divisors (90722899).

989088749 is a wasteful number, since it uses less digits than its factorization.

989088749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67155.

The product of its (nonzero) digits is 10450944, while the sum is 62.

The square root of 989088749 is about 31449.7813823880. The cubic root of 989088749 is about 996.3496071799.

The spelling of 989088749 in words is "nine hundred eighty-nine million, eighty-eight thousand, seven hundred forty-nine".