117765761 has 2 divisors, whose sum is σ = 117765762. Its totient is φ = 117765760.

The previous prime is 117765737. The next prime is 117765763. The reversal of 117765761 is 167567711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85673536 + 32092225 = 9256^2 + 5665^2 .

It is an emirp because it is prime and its reverse (167567711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117765761 - 2²² = 113571457 is a prime.

Together with 117765763, 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 (117765763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58882880 + 58882881.

It is an arithmetic number, because the mean of its divisors is an integer number (58882881).

Almost surely, 2^117765761 is an apocalyptic number.

It is an amenable number.

117765761 is a deficient number, since it is larger than the sum of its proper divisors (1).

117765761 is an equidigital number, since it uses as much as digits as its factorization.

117765761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61740, while the sum is 41.

The square root of 117765761 is about 10851.9934113507. The cubic root of 117765761 is about 490.1620469176.

The spelling of 117765761 in words is "one hundred seventeen million, seven hundred sixty-five thousand, seven hundred sixty-one".