9726689873 has 4 divisors (see below), whose sum is σ = 9727227888. Its totient is φ = 9726151860.

The previous prime is 9726689867. The next prime is 9726689911. The reversal of 9726689873 is 3789866279.

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: 3789866279 = 2539 ⋅1492661.

It is a cyclic number.

It is not a de Polignac number, because 9726689873 - 2¹⁶ = 9726624337 is a prime.

It is a super-2 number, since 2×9726689873² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9726689473) 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, 240911 + ... + 278372.

It is an arithmetic number, because the mean of its divisors is an integer number (2431806972).

Almost surely, 2^9726689873 is an apocalyptic number.

It is an amenable number.

9726689873 is a deficient number, since it is larger than the sum of its proper divisors (538015).

9726689873 is a wasteful number, since it uses less digits than its factorization.

9726689873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538014.

The product of its digits is 54867456, while the sum is 65.

The square root of 9726689873 is about 98623.9822406295. The cubic root of 9726689873 is about 2134.6254828482.

The spelling of 9726689873 in words is "nine billion, seven hundred twenty-six million, six hundred eighty-nine thousand, eight hundred seventy-three".