117747811 has 4 divisors (see below), whose sum is σ = 118405800. Its totient is φ = 117089824.

The previous prime is 117747809. The next prime is 117747823. The reversal of 117747811 is 118747711.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 117747811 - 2¹ = 117747809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117747881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328726 + ... + 329083.

It is an arithmetic number, because the mean of its divisors is an integer number (29601450).

Almost surely, 2^117747811 is an apocalyptic number.

117747811 is a deficient number, since it is larger than the sum of its proper divisors (657989).

117747811 is an equidigital number, since it uses as much as digits as its factorization.

117747811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657988.

The product of its digits is 10976, while the sum is 37.

The square root of 117747811 is about 10851.1663428408. The cubic root of 117747811 is about 490.1371419544.

The spelling of 117747811 in words is "one hundred seventeen million, seven hundred forty-seven thousand, eight hundred eleven".