117481905 has 24 divisors (see below), whose sum is σ = 207971712. Its totient is φ = 61322784.

The previous prime is 117481901. The next prime is 117481939. The reversal of 117481905 is 509184711.

It is not a de Polignac number, because 117481905 - 2² = 117481901 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 117481905.

It is not an unprimeable number, because it can be changed into a prime (117481901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25659 + ... + 29888.

It is an arithmetic number, because the mean of its divisors is an integer number (8665488).

Almost surely, 2^117481905 is an apocalyptic number.

117481905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

117481905 is a deficient number, since it is larger than the sum of its proper divisors (90489807).

117481905 is a wasteful number, since it uses less digits than its factorization.

117481905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55605 (or 55602 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 36.

The square root of 117481905 is about 10838.9070020920. The cubic root of 117481905 is about 489.7679103569.

The spelling of 117481905 in words is "one hundred seventeen million, four hundred eighty-one thousand, nine hundred five".