117845345 has 16 divisors (see below), whose sum is σ = 144121680. Its totient is φ = 92488704.

The previous prime is 117845339. The next prime is 117845347. The reversal of 117845345 is 543548711.

It can be written as a sum of positive squares in 8 ways, for example, as 1183744 + 116661601 = 1088^2 + 10801^2 .

It is a cyclic number.

It is not a de Polignac number, because 117845345 - 2¹⁴ = 117828961 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 117845299 and 117845308.

It is not an unprimeable number, because it can be changed into a prime (117845347) 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, 59999 + ... + 61931.

It is an arithmetic number, because the mean of its divisors is an integer number (9007605).

Almost surely, 2^117845345 is an apocalyptic number.

It is an amenable number.

117845345 is a deficient number, since it is larger than the sum of its proper divisors (26276335).

117845345 is a wasteful number, since it uses less digits than its factorization.

117845345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2164.

The product of its digits is 67200, while the sum is 38.

The square root of 117845345 is about 10855.6595838300. The cubic root of 117845345 is about 490.2724363100.

The spelling of 117845345 in words is "one hundred seventeen million, eight hundred forty-five thousand, three hundred forty-five".