9899743 has 8 divisors (see below), whose sum is σ = 11473920. Its totient is φ = 8365560.

The previous prime is 9899731. The next prime is 9899753. The reversal of 9899743 is 3479989.

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

It is not a de Polignac number, because 9899743 - 2¹³ = 9891551 is a prime.

It is a super-2 number, since 2×9899743² = 196009822932098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9899753) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9463 + ... + 10456.

It is an arithmetic number, because the mean of its divisors is an integer number (1434240).

Almost surely, 2^9899743 is an apocalyptic number.

9899743 is a deficient number, since it is larger than the sum of its proper divisors (1574177).

9899743 is a wasteful number, since it uses less digits than its factorization.

9899743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19997.

The product of its digits is 489888, while the sum is 49.

The square root of 9899743 is about 3146.3857042645. The cubic root of 9899743 is about 214.7210588458.

The spelling of 9899743 in words is "nine million, eight hundred ninety-nine thousand, seven hundred forty-three".