989785247 has 4 divisors (see below), whose sum is σ = 1079765736. Its totient is φ = 899804760.

The previous prime is 989785241. The next prime is 989785249. The reversal of 989785247 is 742587989.

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

It is a cyclic number.

It is not a de Polignac number, because 989785247 - 2¹⁴ = 989768863 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 (989785241) 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, 44990228 + ... + 44990249.

It is an arithmetic number, because the mean of its divisors is an integer number (269941434).

Almost surely, 2^989785247 is an apocalyptic number.

989785247 is a deficient number, since it is larger than the sum of its proper divisors (89980489).

989785247 is a wasteful number, since it uses less digits than its factorization.

989785247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89980488.

The product of its digits is 10160640, while the sum is 59.

The square root of 989785247 is about 31460.8526108241. The cubic root of 989785247 is about 996.5834226263.

The spelling of 989785247 in words is "nine hundred eighty-nine million, seven hundred eighty-five thousand, two hundred forty-seven".