9937198889 has 2 divisors, whose sum is σ = 9937198890. Its totient is φ = 9937198888.

The previous prime is 9937198879. The next prime is 9937198913. The reversal of 9937198889 is 9888917399.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9524784025 + 412414864 = 97595^2 + 20308^2 .

It is a cyclic number.

It is not a de Polignac number, because 9937198889 - 2¹² = 9937194793 is a prime.

It is not a weakly prime, because it can be changed into another prime (9937198849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4968599444 + 4968599445.

It is an arithmetic number, because the mean of its divisors is an integer number (4968599445).

Almost surely, 2^9937198889 is an apocalyptic number.

It is an amenable number.

9937198889 is a deficient number, since it is larger than the sum of its proper divisors (1).

9937198889 is an equidigital number, since it uses as much as digits as its factorization.

9937198889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70543872, while the sum is 71.

The square root of 9937198889 is about 99685.4998934148. The cubic root of 9937198889 is about 2149.9151860539.

The spelling of 9937198889 in words is "nine billion, nine hundred thirty-seven million, one hundred ninety-eight thousand, eight hundred eighty-nine".