117280905 has 64 divisors (see below), whose sum is σ = 223838208. Its totient is φ = 51310080.

The previous prime is 117280903. The next prime is 117280921. The reversal of 117280905 is 509082711.

It is not a de Polignac number, because 117280905 - 2¹ = 117280903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (117280903) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 445804 + ... + 446066.

It is an arithmetic number, because the mean of its divisors is an integer number (3497472).

Almost surely, 2^117280905 is an apocalyptic number.

117280905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

117280905 is a deficient number, since it is larger than the sum of its proper divisors (106557303).

117280905 is a wasteful number, since it uses less digits than its factorization.

117280905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446.

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

The square root of 117280905 is about 10829.6308801362. The cubic root of 117280905 is about 489.4884359825.

The spelling of 117280905 in words is "one hundred seventeen million, two hundred eighty thousand, nine hundred five".