9823851973 has 4 divisors (see below), whose sum is σ = 10579532908. Its totient is φ = 9068171040.

The previous prime is 9823851967. The next prime is 9823852037. The reversal of 9823851973 is 3791583289.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3791583289 = 13 ⋅291660253.

It can be written as a sum of positive squares in 2 ways, for example, as 5589356644 + 4234495329 = 74762^2 + 65073^2 .

It is a cyclic number.

It is not a de Polignac number, because 9823851973 - 2¹³ = 9823843781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9823851673) 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, 377840448 + ... + 377840473.

It is an arithmetic number, because the mean of its divisors is an integer number (2644883227).

Almost surely, 2^9823851973 is an apocalyptic number.

It is an amenable number.

9823851973 is a deficient number, since it is larger than the sum of its proper divisors (755680935).

9823851973 is a wasteful number, since it uses less digits than its factorization.

9823851973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755680934.

The product of its digits is 3265920, while the sum is 55.

The square root of 9823851973 is about 99115.3468086552. The cubic root of 9823851973 is about 2141.7096982201.

The spelling of 9823851973 in words is "nine billion, eight hundred twenty-three million, eight hundred fifty-one thousand, nine hundred seventy-three".