117727785 has 48 divisors (see below), whose sum is σ = 234299520. Its totient is φ = 53568000.

The previous prime is 117727759. The next prime is 117727789. The reversal of 117727785 is 587727711.

It is a happy number.

It is not a de Polignac number, because 117727785 - 2⁷ = 117727657 is a prime.

It is a super-2 number, since 2×117727785² = 27719662722012450, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 117727785.

It is not an unprimeable number, because it can be changed into a prime (117727789) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 78321 + ... + 79809.

It is an arithmetic number, because the mean of its divisors is an integer number (4881240).

Almost surely, 2^117727785 is an apocalyptic number.

117727785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

117727785 is a deficient number, since it is larger than the sum of its proper divisors (116571735).

117727785 is a wasteful number, since it uses less digits than its factorization.

117727785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1758 (or 1755 counting only the distinct ones).

The product of its digits is 192080, while the sum is 45.

The square root of 117727785 is about 10850.2435456537. The cubic root of 117727785 is about 490.1093536306.

The spelling of 117727785 in words is "one hundred seventeen million, seven hundred twenty-seven thousand, seven hundred eighty-five".