9006859889 has 4 divisors (see below), whose sum is σ = 9014487540. Its totient is φ = 8999232240.

The previous prime is 9006859871. The next prime is 9006859907. The reversal of 9006859889 is 9889586009.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9889586009 = 613 ⋅16133093.

It is an interprime number because it is at equal distance from previous prime (9006859871) and next prime (9006859907).

It can be written as a sum of positive squares in 2 ways, for example, as 7539969889 + 1466890000 = 86833^2 + 38300^2 .

It is a cyclic number.

It is not a de Polignac number, because 9006859889 - 2¹⁶ = 9006794353 is a prime.

It is a super-2 number, since 2×9006859889² (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 (9006859189) 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, 3812054 + ... + 3814415.

It is an arithmetic number, because the mean of its divisors is an integer number (2253621885).

Almost surely, 2^9006859889 is an apocalyptic number.

It is an amenable number.

9006859889 is a deficient number, since it is larger than the sum of its proper divisors (7627651).

9006859889 is a wasteful number, since it uses less digits than its factorization.

9006859889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7627650.

The product of its (nonzero) digits is 11197440, while the sum is 62.

The square root of 9006859889 is about 94904.4777078511. The cubic root of 9006859889 is about 2080.6121756560.

The spelling of 9006859889 in words is "nine billion, six million, eight hundred fifty-nine thousand, eight hundred eighty-nine".