9993941977 has 2 divisors, whose sum is σ = 9993941978. Its totient is φ = 9993941976.

The previous prime is 9993941941. The next prime is 9993942047. The reversal of 9993941977 is 7791493999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9443758041 + 550183936 = 97179^2 + 23456^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9993941977 is a prime.

It is not a weakly prime, because it can be changed into another prime (9993941777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4996970988 + 4996970989.

It is an arithmetic number, because the mean of its divisors is an integer number (4996970989).

Almost surely, 2^9993941977 is an apocalyptic number.

It is an amenable number.

9993941977 is a deficient number, since it is larger than the sum of its proper divisors (1).

9993941977 is an equidigital number, since it uses as much as digits as its factorization.

9993941977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34720812, while the sum is 67.

The square root of 9993941977 is about 99969.7052961546. The cubic root of 9993941977 is about 2153.9995483200. Note that the first 3 decimals are identical.

The spelling of 9993941977 in words is "nine billion, nine hundred ninety-three million, nine hundred forty-one thousand, nine hundred seventy-seven".