117977009 has 2 divisors, whose sum is σ = 117977010. Its totient is φ = 117977008.

The previous prime is 117976973. The next prime is 117977011. The reversal of 117977009 is 900779711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91680625 + 26296384 = 9575^2 + 5128^2 .

It is a cyclic number.

It is not a de Polignac number, because 117977009 - 2¹² = 117972913 is a prime.

Together with 117977011, 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 (117977089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58988504 + 58988505.

It is an arithmetic number, because the mean of its divisors is an integer number (58988505).

Almost surely, 2^117977009 is an apocalyptic number.

It is an amenable number.

117977009 is a deficient number, since it is larger than the sum of its proper divisors (1).

117977009 is an equidigital number, since it uses as much as digits as its factorization.

117977009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27783, while the sum is 41.

The square root of 117977009 is about 10861.7221930963. The cubic root of 117977009 is about 490.4549557660.

The spelling of 117977009 in words is "one hundred seventeen million, nine hundred seventy-seven thousand, nine".