9697676821 has 16 divisors (see below), whose sum is σ = 11483274240. Its totient is φ = 8013035520.

The previous prime is 9697676819. The next prime is 9697676827. The reversal of 9697676821 is 1286767969.

It is not a de Polignac number, because 9697676821 - 2¹ = 9697676819 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9697676821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9697676827) 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 15 ways as a sum of consecutive naturals, for example, 92860 + ... + 167386.

It is an arithmetic number, because the mean of its divisors is an integer number (717704640).

Almost surely, 2^9697676821 is an apocalyptic number.

It is an amenable number.

9697676821 is a deficient number, since it is larger than the sum of its proper divisors (1785597419).

9697676821 is a wasteful number, since it uses less digits than its factorization.

9697676821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75204.

The product of its digits is 13716864, while the sum is 61.

The square root of 9697676821 is about 98476.7831572498. The cubic root of 9697676821 is about 2132.5009615325.

The spelling of 9697676821 in words is "nine billion, six hundred ninety-seven million, six hundred seventy-six thousand, eight hundred twenty-one".