989892347 has 4 divisors (see below), whose sum is σ = 989956800. Its totient is φ = 989827896.

The previous prime is 989892313. The next prime is 989892359. The reversal of 989892347 is 743298989.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 743298989 = 43 ⋅17286023.

It is a cyclic number.

It is not a de Polignac number, because 989892347 - 2⁶ = 989892283 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (989892307) 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, 5654 + ... + 44852.

It is an arithmetic number, because the mean of its divisors is an integer number (247489200).

Almost surely, 2^989892347 is an apocalyptic number.

989892347 is a deficient number, since it is larger than the sum of its proper divisors (64453).

989892347 is a wasteful number, since it uses less digits than its factorization.

989892347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64452.

The product of its digits is 7838208, while the sum is 59.

The square root of 989892347 is about 31462.5546801273. The cubic root of 989892347 is about 996.6193665294.

The spelling of 989892347 in words is "nine hundred eighty-nine million, eight hundred ninety-two thousand, three hundred forty-seven".