117813545 has 4 divisors (see below), whose sum is σ = 141376260. Its totient is φ = 94250832.

The previous prime is 117813517. The next prime is 117813557. The reversal of 117813545 is 545318711.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13446889 + 104366656 = 3667^2 + 10216^2 .

It is a cyclic number.

It is not a de Polignac number, because 117813545 - 2¹² = 117809449 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11781350 + ... + 11781359.

It is an arithmetic number, because the mean of its divisors is an integer number (35344065).

Almost surely, 2^117813545 is an apocalyptic number.

It is an amenable number.

117813545 is a deficient number, since it is larger than the sum of its proper divisors (23562715).

117813545 is an equidigital number, since it uses as much as digits as its factorization.

117813545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23562714.

The product of its digits is 16800, while the sum is 35.

The square root of 117813545 is about 10854.1948112239. The cubic root of 117813545 is about 490.2283331225.

The spelling of 117813545 in words is "one hundred seventeen million, eight hundred thirteen thousand, five hundred forty-five".