9881623489 has 4 divisors (see below), whose sum is σ = 9944563924. Its totient is φ = 9818683056.

The previous prime is 9881623463. The next prime is 9881623511. The reversal of 9881623489 is 9843261889.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9843261889 = 61 ⋅161364949.

It can be written as a sum of positive squares in 2 ways, for example, as 947593089 + 8934030400 = 30783^2 + 94520^2 .

It is a cyclic number.

It is not a de Polignac number, because 9881623489 - 2⁹ = 9881622977 is a prime.

It is a super-3 number, since 3×9881623489³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9881623789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31469982 + ... + 31470295.

It is an arithmetic number, because the mean of its divisors is an integer number (2486140981).

Almost surely, 2^9881623489 is an apocalyptic number.

It is an amenable number.

9881623489 is a deficient number, since it is larger than the sum of its proper divisors (62940435).

9881623489 is a wasteful number, since it uses less digits than its factorization.

9881623489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62940434.

The product of its digits is 5971968, while the sum is 58.

The square root of 9881623489 is about 99406.3553752978. The cubic root of 9881623489 is about 2145.8997744006.

The spelling of 9881623489 in words is "nine billion, eight hundred eighty-one million, six hundred twenty-three thousand, four hundred eighty-nine".