117720591 has 8 divisors (see below), whose sum is σ = 157051440. Its totient is φ = 78435072.

The previous prime is 117720539. The next prime is 117720593. The reversal of 117720591 is 195027711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 117720591 - 2⁶ = 117720527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117720593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4720 + ... + 16053.

It is an arithmetic number, because the mean of its divisors is an integer number (19631430).

Almost surely, 2^117720591 is an apocalyptic number.

117720591 is a deficient number, since it is larger than the sum of its proper divisors (39330849).

117720591 is a wasteful number, since it uses less digits than its factorization.

117720591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22665.

The product of its (nonzero) digits is 4410, while the sum is 33.

The square root of 117720591 is about 10849.9120272931. The cubic root of 117720591 is about 490.0993703784.

The spelling of 117720591 in words is "one hundred seventeen million, seven hundred twenty thousand, five hundred ninety-one".