117699381 has 24 divisors (see below), whose sum is σ = 180422424. Its totient is φ = 73681920.

The previous prime is 117699367. The next prime is 117699383. The reversal of 117699381 is 183996711.

It can be written as a sum of positive squares in 4 ways, for example, as 2480625 + 115218756 = 1575^2 + 10734^2 .

It is not a de Polignac number, because 117699381 - 2¹⁵ = 117666613 is a prime.

It is a super-2 number, since 2×117699381² = 27706288575566322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117699383) 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, 125145 + ... + 126081.

It is an arithmetic number, because the mean of its divisors is an integer number (7517601).

Almost surely, 2^117699381 is an apocalyptic number.

It is an amenable number.

117699381 is a deficient number, since it is larger than the sum of its proper divisors (62723043).

117699381 is a wasteful number, since it uses less digits than its factorization.

117699381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1781 (or 1778 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The square root of 117699381 is about 10848.9345559829. The cubic root of 117699381 is about 490.0699344858.

The spelling of 117699381 in words is "one hundred seventeen million, six hundred ninety-nine thousand, three hundred eighty-one".