9889009693 has 4 divisors (see below), whose sum is σ = 10051124668. Its totient is φ = 9726894720.

The previous prime is 9889009679. The next prime is 9889009699. The reversal of 9889009693 is 3969009889.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3969009889 = 13 ⋅305308453.

It can be written as a sum of positive squares in 2 ways, for example, as 5550548004 + 4338461689 = 74502^2 + 65867^2 .

It is a cyclic number.

It is not a de Polignac number, because 9889009693 - 2⁹ = 9889009181 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (61), and also a Moran number because the ratio is a prime number: 162114913 = 9889009693 / (9 + 8 + 8 + 9 + 0 + 0 + 9 + 6 + 9 + 3).

It is the 99444-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9889009699) by changing a digit.

It is a nontrivial repunit in base 99443.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81057396 + ... + 81057517.

It is an arithmetic number, because the mean of its divisors is an integer number (2512781167).

Almost surely, 2^9889009693 is an apocalyptic number.

It is an amenable number.

9889009693 is a deficient number, since it is larger than the sum of its proper divisors (162114975).

9889009693 is a wasteful number, since it uses less digits than its factorization.

9889009693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162114974.

The product of its (nonzero) digits is 7558272, while the sum is 61.

The square root of 9889009693 is about 99443.5000037710. The cubic root of 9889009693 is about 2146.4343055268.

The spelling of 9889009693 in words is "nine billion, eight hundred eighty-nine million, nine thousand, six hundred ninety-three".