117189621 has 6 divisors (see below), whose sum is σ = 169273910. Its totient is φ = 78126408.

The previous prime is 117189617. The next prime is 117189629. The reversal of 117189621 is 126981711.

117189621 is a `hidden beast` number, since 1 + 17 + 18 + 9 + 621 = 666.

It can be written as a sum of positive squares in only one way, i.e., 98604900 + 18584721 = 9930^2 + 4311^2 .

It is not a de Polignac number, because 117189621 - 2² = 117189617 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117189629) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6510526 + ... + 6510543.

Almost surely, 2^117189621 is an apocalyptic number.

It is an amenable number.

117189621 is a deficient number, since it is larger than the sum of its proper divisors (52084289).

117189621 is a wasteful number, since it uses less digits than its factorization.

117189621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13021075 (or 13021072 counting only the distinct ones).

The product of its digits is 6048, while the sum is 36.

The square root of 117189621 is about 10825.4155116559. The cubic root of 117189621 is about 489.3614074605.

The spelling of 117189621 in words is "one hundred seventeen million, one hundred eighty-nine thousand, six hundred twenty-one".