117581306 has 4 divisors (see below), whose sum is σ = 176371962. Its totient is φ = 58790652.

The previous prime is 117581293. The next prime is 117581377. The reversal of 117581306 is 603185711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 603185711 = 499 ⋅1208789.

It can be written as a sum of positive squares in only one way, i.e., 84805681 + 32775625 = 9209^2 + 5725^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29395325 + ... + 29395328.

Almost surely, 2^117581306 is an apocalyptic number.

117581306 is a deficient number, since it is larger than the sum of its proper divisors (58790656).

117581306 is an equidigital number, since it uses as much as digits as its factorization.

117581306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58790655.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 117581306 is about 10843.4914119023. The cubic root of 117581306 is about 489.9060016832.

The spelling of 117581306 in words is "one hundred seventeen million, five hundred eighty-one thousand, three hundred six".