117786613 has 4 divisors (see below), whose sum is σ = 134613280. Its totient is φ = 100959948.

The previous prime is 117786607. The next prime is 117786623. The reversal of 117786613 is 316687711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 316687711 = 977 ⋅324143.

It is a cyclic number.

It is not a de Polignac number, because 117786613 - 2¹⁷ = 117655541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117786623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8413323 + ... + 8413336.

It is an arithmetic number, because the mean of its divisors is an integer number (33653320).

Almost surely, 2^117786613 is an apocalyptic number.

It is an amenable number.

117786613 is a deficient number, since it is larger than the sum of its proper divisors (16826667).

117786613 is an equidigital number, since it uses as much as digits as its factorization.

117786613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16826666.

The product of its digits is 42336, while the sum is 40.

The square root of 117786613 is about 10852.9541139728. The cubic root of 117786613 is about 490.1909751214.

The spelling of 117786613 in words is "one hundred seventeen million, seven hundred eighty-six thousand, six hundred thirteen".