117548661 has 4 divisors (see below), whose sum is σ = 156731552. Its totient is φ = 78365772.

The previous prime is 117548657. The next prime is 117548663. The reversal of 117548661 is 166845711.

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 not a de Polignac number, because 117548661 - 2² = 117548657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117548663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19591441 + ... + 19591446.

It is an arithmetic number, because the mean of its divisors is an integer number (39182888).

Almost surely, 2^117548661 is an apocalyptic number.

It is an amenable number.

117548661 is a deficient number, since it is larger than the sum of its proper divisors (39182891).

117548661 is an equidigital number, since it uses as much as digits as its factorization.

117548661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39182890.

The product of its digits is 40320, while the sum is 39.

The square root of 117548661 is about 10841.9860265544. The cubic root of 117548661 is about 489.8606586994.

The spelling of 117548661 in words is "one hundred seventeen million, five hundred forty-eight thousand, six hundred sixty-one".