9799239643 has 4 divisors (see below), whose sum is σ = 9800505520. Its totient is φ = 9797973768.

The previous prime is 9799239559. The next prime is 9799239661. The reversal of 9799239643 is 3469329979.

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 9799239643 - 2²⁵ = 9765685211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9799239743) 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, 621255 + ... + 636832.

It is an arithmetic number, because the mean of its divisors is an integer number (2450126380).

Almost surely, 2^9799239643 is an apocalyptic number.

9799239643 is a deficient number, since it is larger than the sum of its proper divisors (1265877).

9799239643 is a wasteful number, since it uses less digits than its factorization.

9799239643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1265876.

The product of its digits is 19840464, while the sum is 61.

The square root of 9799239643 is about 98991.1089088308. The cubic root of 9799239643 is about 2139.9196146327.

The spelling of 9799239643 in words is "nine billion, seven hundred ninety-nine million, two hundred thirty-nine thousand, six hundred forty-three".