9861040823 has 8 divisors (see below), whose sum is σ = 9997864128. Its totient is φ = 9724264704.

The previous prime is 9861040811. The next prime is 9861040837. The reversal of 9861040823 is 3280401689.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9861040823 is a prime.

It is a super-2 number, since 2×9861040823² (a number of 21 digits) 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 (9861040873) 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, 720815 + ... + 734367.

It is an arithmetic number, because the mean of its divisors is an integer number (1249733016).

Almost surely, 2^9861040823 is an apocalyptic number.

9861040823 is a deficient number, since it is larger than the sum of its proper divisors (136823305).

9861040823 is a wasteful number, since it uses less digits than its factorization.

9861040823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23593.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 9861040823 is about 99302.7734909756. The cubic root of 9861040823 is about 2144.4088237036.

The spelling of 9861040823 in words is "nine billion, eight hundred sixty-one million, forty thousand, eight hundred twenty-three".