117206811 has 8 divisors (see below), whose sum is σ = 173639760. Its totient is φ = 78137856.

The previous prime is 117206807. The next prime is 117206819. The reversal of 117206811 is 118602711.

It is not a de Polignac number, because 117206811 - 2² = 117206807 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 4340993 = 117206811 / (1 + 1 + 7 + 2 + 0 + 6 + 8 + 1 + 1).

It is not an unprimeable number, because it can be changed into a prime (117206819) 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, 2170470 + ... + 2170523.

It is an arithmetic number, because the mean of its divisors is an integer number (21704970).

Almost surely, 2^117206811 is an apocalyptic number.

117206811 is a deficient number, since it is larger than the sum of its proper divisors (56432949).

117206811 is an equidigital number, since it uses as much as digits as its factorization.

117206811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4341002 (or 4340996 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 27.

The square root of 117206811 is about 10826.2094474474. The cubic root of 117206811 is about 489.3853336730.

The spelling of 117206811 in words is "one hundred seventeen million, two hundred six thousand, eight hundred eleven".