117639811 has 8 divisors (see below), whose sum is σ = 123940880. Its totient is φ = 111349728.

The previous prime is 117639803. The next prime is 117639817. The reversal of 117639811 is 118936711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 117639811 - 2³ = 117639803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117639817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28405 + ... + 32281.

It is an arithmetic number, because the mean of its divisors is an integer number (15492610).

Almost surely, 2^117639811 is an apocalyptic number.

117639811 is a deficient number, since it is larger than the sum of its proper divisors (6301069).

117639811 is a wasteful number, since it uses less digits than its factorization.

117639811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5493.

The product of its digits is 9072, while the sum is 37.

The square root of 117639811 is about 10846.1887776306. The cubic root of 117639811 is about 489.9872424833.

The spelling of 117639811 in words is "one hundred seventeen million, six hundred thirty-nine thousand, eight hundred eleven".