117549945 has 24 divisors (see below), whose sum is σ = 205565256. Its totient is φ = 62135808.

The previous prime is 117549899. The next prime is 117549947. The reversal of 117549945 is 549945711.

117549945 is a `hidden beast` number, since 1 + 17 + 549 + 94 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 16426809 + 101123136 = 4053^2 + 10056^2 .

It is not a de Polignac number, because 117549945 - 2⁶ = 117549881 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 117549945.

It is not an unprimeable number, because it can be changed into a prime (117549947) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6474 + ... + 16643.

It is an arithmetic number, because the mean of its divisors is an integer number (8565219).

Almost surely, 2^117549945 is an apocalyptic number.

117549945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

117549945 is a deficient number, since it is larger than the sum of its proper divisors (88015311).

117549945 is a wasteful number, since it uses less digits than its factorization.

117549945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23241 (or 23238 counting only the distinct ones).

The product of its digits is 226800, while the sum is 45.

The square root of 117549945 is about 10842.0452406361. The cubic root of 117549945 is about 489.8624422978.

The spelling of 117549945 in words is "one hundred seventeen million, five hundred forty-nine thousand, nine hundred forty-five".