117853161 has 4 divisors (see below), whose sum is σ = 157137552. Its totient is φ = 78568772.

The previous prime is 117853123. The next prime is 117853199. The reversal of 117853161 is 161358711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (117853123) and next prime (117853199).

It is a cyclic number.

It is not a de Polignac number, because 117853161 - 2⁷ = 117853033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (117853121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19642191 + ... + 19642196.

It is an arithmetic number, because the mean of its divisors is an integer number (39284388).

Almost surely, 2^117853161 is an apocalyptic number.

It is an amenable number.

117853161 is a deficient number, since it is larger than the sum of its proper divisors (39284391).

117853161 is an equidigital number, since it uses as much as digits as its factorization.

117853161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39284390.

The product of its digits is 5040, while the sum is 33.

The square root of 117853161 is about 10856.0195744112. The cubic root of 117853161 is about 490.2832750486.

The spelling of 117853161 in words is "one hundred seventeen million, eight hundred fifty-three thousand, one hundred sixty-one".