117321657 has 8 divisors (see below), whose sum is σ = 156705120. Its totient is φ = 78076320.

The previous prime is 117321653. The next prime is 117321661. The reversal of 117321657 is 756123711.

It is an interprime number because it is at equal distance from previous prime (117321653) and next prime (117321661).

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

It is not a de Polignac number, because 117321657 - 2² = 117321653 is a prime.

It is not an unprimeable number, because it can be changed into a prime (117321653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32532 + ... + 35957.

It is an arithmetic number, because the mean of its divisors is an integer number (19588140).

Almost surely, 2^117321657 is an apocalyptic number.

It is an amenable number.

117321657 is a deficient number, since it is larger than the sum of its proper divisors (39383463).

117321657 is an equidigital number, since it uses as much as digits as its factorization.

117321657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69063.

The product of its digits is 8820, while the sum is 33.

The square root of 117321657 is about 10831.5122212921. The cubic root of 117321657 is about 489.5451241614.

The spelling of 117321657 in words is "one hundred seventeen million, three hundred twenty-one thousand, six hundred fifty-seven".