117785213 has 32 divisors (see below), whose sum is σ = 153280512. Its totient is φ = 87998400.

The previous prime is 117785209. The next prime is 117785233. The reversal of 117785213 is 312587711.

It is a happy number.

It is not a de Polignac number, because 117785213 - 2² = 117785209 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117785233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 120818 + ... + 121788.

It is an arithmetic number, because the mean of its divisors is an integer number (4790016).

Almost surely, 2^117785213 is an apocalyptic number.

117785213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

117785213 is a deficient number, since it is larger than the sum of its proper divisors (35495299).

117785213 is a wasteful number, since it uses less digits than its factorization.

117785213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065.

The product of its digits is 11760, while the sum is 35.

The square root of 117785213 is about 10852.8896152131. The cubic root of 117785213 is about 490.1890329933.

The spelling of 117785213 in words is "one hundred seventeen million, seven hundred eighty-five thousand, two hundred thirteen".