989724347 has 2 divisors, whose sum is σ = 989724348. Its totient is φ = 989724346.

The previous prime is 989724319. The next prime is 989724349. The reversal of 989724347 is 743427989.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 989724347 - 2⁶ = 989724283 is a prime.

Together with 989724349, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (989724349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494862173 + 494862174.

It is an arithmetic number, because the mean of its divisors is an integer number (494862174).

Almost surely, 2^989724347 is an apocalyptic number.

989724347 is a deficient number, since it is larger than the sum of its proper divisors (1).

989724347 is an equidigital number, since it uses as much as digits as its factorization.

989724347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3048192, while the sum is 53.

The square root of 989724347 is about 31459.8847264258. The cubic root of 989724347 is about 996.5629827799.

The spelling of 989724347 in words is "nine hundred eighty-nine million, seven hundred twenty-four thousand, three hundred forty-seven".