117647765 has 16 divisors (see below), whose sum is σ = 143486640. Its totient is φ = 92590080.

The previous prime is 117647743. The next prime is 117647767. The reversal of 117647765 is 567746711.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 5414929 + 112232836 = 2327^2 + 10594^2 .

It is not a de Polignac number, because 117647765 - 2¹⁸ = 117385621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117647767) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106697 + ... + 107793.

It is an arithmetic number, because the mean of its divisors is an integer number (8967915).

Almost surely, 2^117647765 is an apocalyptic number.

It is an amenable number.

117647765 is a deficient number, since it is larger than the sum of its proper divisors (25838875).

117647765 is a wasteful number, since it uses less digits than its factorization.

117647765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1432.

The product of its digits is 246960, while the sum is 44.

The square root of 117647765 is about 10846.5554440108. Note that the first 3 decimals coincide. The cubic root of 117647765 is about 489.9982854306.

The spelling of 117647765 in words is "one hundred seventeen million, six hundred forty-seven thousand, seven hundred sixty-five".