9940008977 has 2 divisors, whose sum is σ = 9940008978. Its totient is φ = 9940008976.

The previous prime is 9940008959. The next prime is 9940008979. The reversal of 9940008977 is 7798000499.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9928926736 + 11082241 = 99644^2 + 3329^2 .

It is a cyclic number.

It is not a de Polignac number, because 9940008977 - 2²⁸ = 9671573521 is a prime.

Together with 9940008979, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9940008979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4970004488 + 4970004489.

It is an arithmetic number, because the mean of its divisors is an integer number (4970004489).

Almost surely, 2^9940008977 is an apocalyptic number.

It is an amenable number.

9940008977 is a deficient number, since it is larger than the sum of its proper divisors (1).

9940008977 is an equidigital number, since it uses as much as digits as its factorization.

9940008977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1143072, while the sum is 53.

The square root of 9940008977 is about 99699.5936651700. The cubic root of 9940008977 is about 2150.1178213420.

The spelling of 9940008977 in words is "nine billion, nine hundred forty million, eight thousand, nine hundred seventy-seven".