9999986837 has 2 divisors, whose sum is σ = 9999986838. Its totient is φ = 9999986836.

The previous prime is 9999986831. The next prime is 9999986863. The reversal of 9999986837 is 7386899999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7499386801 + 2500600036 = 86599^2 + 50006^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9999986837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9999986831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999993418 + 4999993419.

It is an arithmetic number, because the mean of its divisors is an integer number (4999993419).

Almost surely, 2^9999986837 is an apocalyptic number.

It is an amenable number.

9999986837 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999986837 is an equidigital number, since it uses as much as digits as its factorization.

9999986837 is an evil number, because the sum of its binary digits is even.

The product of its digits is 476171136, while the sum is 77.

The square root of 9999986837 is about 99999.9341849783. The cubic root of 9999986837 is about 2154.4337447373.

The spelling of 9999986837 in words is "nine billion, nine hundred ninety-nine million, nine hundred eighty-six thousand, eight hundred thirty-seven".