117816445 has 4 divisors (see below), whose sum is σ = 141379740. Its totient is φ = 94253152.

The previous prime is 117816427. The next prime is 117816449. The reversal of 117816445 is 544618711.

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 23454649 + 94361796 = 4843^2 + 9714^2 .

It is a cyclic number.

It is not a de Polignac number, because 117816445 - 2¹¹ = 117814397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117816449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11781640 + ... + 11781649.

It is an arithmetic number, because the mean of its divisors is an integer number (35344935).

Almost surely, 2^117816445 is an apocalyptic number.

It is an amenable number.

117816445 is a deficient number, since it is larger than the sum of its proper divisors (23563295).

117816445 is an equidigital number, since it uses as much as digits as its factorization.

117816445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23563294.

The product of its digits is 26880, while the sum is 37.

The square root of 117816445 is about 10854.3283993069. The cubic root of 117816445 is about 490.2323554402.

The spelling of 117816445 in words is "one hundred seventeen million, eight hundred sixteen thousand, four hundred forty-five".