117775845 has 48 divisors (see below), whose sum is σ = 223891200. Its totient is φ = 56799360.

The previous prime is 117775841. The next prime is 117775849. The reversal of 117775845 is 548577711.

It is an interprime number because it is at equal distance from previous prime (117775841) and next prime (117775849).

It is not a de Polignac number, because 117775845 - 2² = 117775841 is a prime.

It is a super-2 number, since 2×117775845² = 27742299330928050, which contains 22 as substring.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 117775845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117775841) 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, 112836 + ... + 113874.

It is an arithmetic number, because the mean of its divisors is an integer number (4664400).

Almost surely, 2^117775845 is an apocalyptic number.

117775845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

117775845 is a deficient number, since it is larger than the sum of its proper divisors (106115355).

117775845 is a wasteful number, since it uses less digits than its factorization.

117775845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290 (or 1287 counting only the distinct ones).

The product of its digits is 274400, while the sum is 45.

The square root of 117775845 is about 10852.4580165048. The cubic root of 117775845 is about 490.1760369855.

The spelling of 117775845 in words is "one hundred seventeen million, seven hundred seventy-five thousand, eight hundred forty-five".