989705047 has 4 divisors (see below), whose sum is σ = 990195336. Its totient is φ = 989214760.

The previous prime is 989705029. The next prime is 989705063. The reversal of 989705047 is 740507989.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-989705047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989705077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242104 + ... + 246157.

It is an arithmetic number, because the mean of its divisors is an integer number (247548834).

Almost surely, 2^989705047 is an apocalyptic number.

989705047 is a deficient number, since it is larger than the sum of its proper divisors (490289).

989705047 is a wasteful number, since it uses less digits than its factorization.

989705047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490288.

The product of its (nonzero) digits is 635040, while the sum is 49.

The square root of 989705047 is about 31459.5779850906. The cubic root of 989705047 is about 996.5565049525.

The spelling of 989705047 in words is "nine hundred eighty-nine million, seven hundred five thousand, forty-seven".