9399820641 has 4 divisors (see below), whose sum is σ = 12533094192. Its totient is φ = 6266547092.

The previous prime is 9399820583. The next prime is 9399820649. The reversal of 9399820641 is 1460289939.

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: 1460289939 = 3 ⋅486763313.

It is a cyclic number.

It is not a de Polignac number, because 9399820641 - 2²² = 9395626337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9399820649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1566636771 + ... + 1566636776.

It is an arithmetic number, because the mean of its divisors is an integer number (3133273548).

Almost surely, 2^9399820641 is an apocalyptic number.

It is an amenable number.

9399820641 is a deficient number, since it is larger than the sum of its proper divisors (3133273551).

9399820641 is a wasteful number, since it uses less digits than its factorization.

9399820641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3133273550.

The product of its (nonzero) digits is 839808, while the sum is 51.

The square root of 9399820641 is about 96952.6721704977. The cubic root of 9399820641 is about 2110.4408713916.

The spelling of 9399820641 in words is "nine billion, three hundred ninety-nine million, eight hundred twenty thousand, six hundred forty-one".