117780621 has 8 divisors (see below), whose sum is σ = 179475264. Its totient is φ = 67303200.

The previous prime is 117780617. The next prime is 117780623. The reversal of 117780621 is 126087711.

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

It is not a de Polignac number, because 117780621 - 2² = 117780617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117780623) 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, 2804280 + ... + 2804321.

It is an arithmetic number, because the mean of its divisors is an integer number (22434408).

Almost surely, 2^117780621 is an apocalyptic number.

It is an amenable number.

117780621 is a deficient number, since it is larger than the sum of its proper divisors (61694643).

117780621 is an equidigital number, since it uses as much as digits as its factorization.

117780621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5608611.

The product of its (nonzero) digits is 4704, while the sum is 33.

The square root of 117780621 is about 10852.6780565905. The cubic root of 117780621 is about 490.1826627050.

The spelling of 117780621 in words is "one hundred seventeen million, seven hundred eighty thousand, six hundred twenty-one".