117722581 has 4 divisors (see below), whose sum is σ = 118373164. Its totient is φ = 117072000.

The previous prime is 117722573. The next prime is 117722599. The reversal of 117722581 is 185227711.

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 1276900 + 116445681 = 1130^2 + 10791^2 .

It is a cyclic number.

It is not a de Polignac number, because 117722581 - 2³ = 117722573 is a prime.

It is a super-2 number, since 2×117722581² = 27717212154603122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117729581) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 325020 + ... + 325381.

It is an arithmetic number, because the mean of its divisors is an integer number (29593291).

Almost surely, 2^117722581 is an apocalyptic number.

It is an amenable number.

117722581 is a deficient number, since it is larger than the sum of its proper divisors (650583).

117722581 is an equidigital number, since it uses as much as digits as its factorization.

117722581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650582.

The product of its digits is 7840, while the sum is 34.

The square root of 117722581 is about 10850.0037327183. The cubic root of 117722581 is about 490.1021319804.

It can be divided in two parts, 1177225 and 81, that multiplied together give a square (95355225 = 9765²).

The spelling of 117722581 in words is "one hundred seventeen million, seven hundred twenty-two thousand, five hundred eighty-one".