9834787321 has 4 divisors (see below), whose sum is σ = 9838150272. Its totient is φ = 9831424372.

The previous prime is 9834787307. The next prime is 9834787343. The reversal of 9834787321 is 1237874389.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1237874389 = 89 ⋅13908701.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9834787321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9834767321) 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, 1677085 + ... + 1682938.

It is an arithmetic number, because the mean of its divisors is an integer number (2459537568).

Almost surely, 2^9834787321 is an apocalyptic number.

It is an amenable number.

9834787321 is a deficient number, since it is larger than the sum of its proper divisors (3362951).

9834787321 is a wasteful number, since it uses less digits than its factorization.

9834787321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3362950.

The product of its digits is 2032128, while the sum is 52.

The square root of 9834787321 is about 99170.4962224149. The cubic root of 9834787321 is about 2142.5040796311.

The spelling of 9834787321 in words is "nine billion, eight hundred thirty-four million, seven hundred eighty-seven thousand, three hundred twenty-one".