117355621 has 4 divisors (see below), whose sum is σ = 119569932. Its totient is φ = 115141312.

The previous prime is 117355577. The next prime is 117355627. The reversal of 117355621 is 126553711.

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 48233025 + 69122596 = 6945^2 + 8314^2 .

It is a cyclic number.

It is not a de Polignac number, because 117355621 - 2¹¹ = 117353573 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117355627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1107076 + ... + 1107181.

It is an arithmetic number, because the mean of its divisors is an integer number (29892483).

Almost surely, 2^117355621 is an apocalyptic number.

It is an amenable number.

117355621 is a deficient number, since it is larger than the sum of its proper divisors (2214311).

117355621 is an equidigital number, since it uses as much as digits as its factorization.

117355621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2214310.

The product of its digits is 6300, while the sum is 31.

The square root of 117355621 is about 10833.0799406263. The cubic root of 117355621 is about 489.5923598461.

The spelling of 117355621 in words is "one hundred seventeen million, three hundred fifty-five thousand, six hundred twenty-one".