9689121813 has 16 divisors (see below), whose sum is σ = 14774068736. Its totient is φ = 5533006320.

The previous prime is 9689121803. The next prime is 9689121823. The reversal of 9689121813 is 3181219869.

It is an interprime number because it is at equal distance from previous prime (9689121803) and next prime (9689121823).

It is not a de Polignac number, because 9689121813 - 2⁸ = 9689121557 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9689121803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118531 + ... + 182832.

It is an arithmetic number, because the mean of its divisors is an integer number (923379296).

Almost surely, 2^9689121813 is an apocalyptic number.

It is an amenable number.

9689121813 is a deficient number, since it is larger than the sum of its proper divisors (5084946923).

9689121813 is a wasteful number, since it uses less digits than its factorization.

9689121813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302904.

The product of its digits is 186624, while the sum is 48.

The square root of 9689121813 is about 98433.3368986341. The cubic root of 9689121813 is about 2131.8737003028.

The spelling of 9689121813 in words is "nine billion, six hundred eighty-nine million, one hundred twenty-one thousand, eight hundred thirteen".