9814820861 has 8 divisors (see below), whose sum is σ = 10333526880. Its totient is φ = 9296328528.

The previous prime is 9814820837. The next prime is 9814820879. The reversal of 9814820861 is 1680284189.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 9814820861 - 2¹⁴ = 9814804477 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 (9814820831) 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, 45590 + ... + 147336.

It is an arithmetic number, because the mean of its divisors is an integer number (1291690860).

Almost surely, 2^9814820861 is an apocalyptic number.

It is an amenable number.

9814820861 is a deficient number, since it is larger than the sum of its proper divisors (518706019).

9814820861 is a wasteful number, since it uses less digits than its factorization.

9814820861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106843.

The product of its (nonzero) digits is 221184, while the sum is 47.

The square root of 9814820861 is about 99069.7777377137. Note that the first 4 decimals coincide. The cubic root of 9814820861 is about 2141.0532025024.

The spelling of 9814820861 in words is "nine billion, eight hundred fourteen million, eight hundred twenty thousand, eight hundred sixty-one".