989898747 has 8 divisors (see below), whose sum is σ = 1320138240. Its totient is φ = 659795880.

The previous prime is 989898739. The next prime is 989898781. The reversal of 989898747 is 747898989.

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

It is not a de Polignac number, because 989898747 - 2³ = 989898739 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (989894747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15847 + ... + 47232.

It is an arithmetic number, because the mean of its divisors is an integer number (165017280).

Almost surely, 2^989898747 is an apocalyptic number.

989898747 is a deficient number, since it is larger than the sum of its proper divisors (330239493).

989898747 is a wasteful number, since it uses less digits than its factorization.

989898747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68313.

The product of its digits is 73156608, while the sum is 69.

The square root of 989898747 is about 31462.6563881691. The cubic root of 989898747 is about 996.6215143556.

The spelling of 989898747 in words is "nine hundred eighty-nine million, eight hundred ninety-eight thousand, seven hundred forty-seven".