117741977 has 2 divisors, whose sum is σ = 117741978. Its totient is φ = 117741976.

The previous prime is 117741973. The next prime is 117741979. The reversal of 117741977 is 779147711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73599241 + 44142736 = 8579^2 + 6644^2 .

It is an emirp because it is prime and its reverse (779147711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117741977 - 2² = 117741973 is a prime.

Together with 117741979, 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 (117741971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58870988 + 58870989.

It is an arithmetic number, because the mean of its divisors is an integer number (58870989).

Almost surely, 2^117741977 is an apocalyptic number.

It is an amenable number.

117741977 is a deficient number, since it is larger than the sum of its proper divisors (1).

117741977 is an equidigital number, since it uses as much as digits as its factorization.

117741977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86436, while the sum is 44.

The square root of 117741977 is about 10850.8975204819. The cubic root of 117741977 is about 490.1290469496.

The spelling of 117741977 in words is "one hundred seventeen million, seven hundred forty-one thousand, nine hundred seventy-seven".