117655021 has 8 divisors (see below), whose sum is σ = 129276000. Its totient is φ = 106188240.

The previous prime is 117654997. The next prime is 117655081. The reversal of 117655021 is 120556711.

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

It is a cyclic number.

It is not a de Polignac number, because 117655021 - 2⁵ = 117654989 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 (117655081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36946 + ... + 40003.

It is an arithmetic number, because the mean of its divisors is an integer number (16159500).

Almost surely, 2^117655021 is an apocalyptic number.

117655021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

117655021 is a deficient number, since it is larger than the sum of its proper divisors (11620979).

117655021 is a wasteful number, since it uses less digits than its factorization.

117655021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77099.

The product of its (nonzero) digits is 2100, while the sum is 28.

The square root of 117655021 is about 10846.8899229226. The cubic root of 117655021 is about 490.0083588745.

The spelling of 117655021 in words is "one hundred seventeen million, six hundred fifty-five thousand, twenty-one".