9989625827 has 2 divisors, whose sum is σ = 9989625828. Its totient is φ = 9989625826.

The previous prime is 9989625757. The next prime is 9989625847. The reversal of 9989625827 is 7285269899.

It is a strong prime.

It is an emirp because it is prime and its reverse (7285269899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9989625827 - 2⁸ = 9989625571 is a prime.

It is not a weakly prime, because it can be changed into another prime (9989625847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4994812913 + 4994812914.

It is an arithmetic number, because the mean of its divisors is an integer number (4994812914).

Almost surely, 2^9989625827 is an apocalyptic number.

9989625827 is a deficient number, since it is larger than the sum of its proper divisors (1).

9989625827 is an equidigital number, since it uses as much as digits as its factorization.

9989625827 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39191040, while the sum is 65.

The square root of 9989625827 is about 99948.1156750841. The cubic root of 9989625827 is about 2153.6894163128.

The spelling of 9989625827 in words is "nine billion, nine hundred eighty-nine million, six hundred twenty-five thousand, eight hundred twenty-seven".