9979641127 has 2 divisors, whose sum is σ = 9979641128. Its totient is φ = 9979641126.

The previous prime is 9979641103. The next prime is 9979641157. The reversal of 9979641127 is 7211469799.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9979641127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9979641157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4989820563 + 4989820564.

It is an arithmetic number, because the mean of its divisors is an integer number (4989820564).

Almost surely, 2^9979641127 is an apocalyptic number.

9979641127 is a deficient number, since it is larger than the sum of its proper divisors (1).

9979641127 is an equidigital number, since it uses as much as digits as its factorization.

9979641127 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1714608, while the sum is 55.

The square root of 9979641127 is about 99898.1537717289. The cubic root of 9979641127 is about 2152.9716346356.

The spelling of 9979641127 in words is "nine billion, nine hundred seventy-nine million, six hundred forty-one thousand, one hundred twenty-seven".