117783945 has 48 divisors (see below), whose sum is σ = 216066240. Its totient is φ = 59190912.

The previous prime is 117783937. The next prime is 117783947. The reversal of 117783945 is 549387711.

It is not a de Polignac number, because 117783945 - 2³ = 117783937 is a prime.

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 117783945.

It is not an unprimeable number, because it can be changed into a prime (117783947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 296487 + ... + 296883.

It is an arithmetic number, because the mean of its divisors is an integer number (4501380).

Almost surely, 2^117783945 is an apocalyptic number.

117783945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

117783945 is a deficient number, since it is larger than the sum of its proper divisors (98282295).

117783945 is a wasteful number, since it uses less digits than its factorization.

117783945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774 (or 771 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 117783945 is about 10852.8311974342. The cubic root of 117783945 is about 490.1872739668.

The spelling of 117783945 in words is "one hundred seventeen million, seven hundred eighty-three thousand, nine hundred forty-five".