117858547 has 4 divisors (see below), whose sum is σ = 117891400. Its totient is φ = 117825696.

The previous prime is 117858541. The next prime is 117858551. The reversal of 117858547 is 745858711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 745858711 = 13 ⋅57373747.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117858547 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 117858497 and 117858506.

It is not an unprimeable number, because it can be changed into a prime (117858541) 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 3 ways as a sum of consecutive naturals, for example, 10278 + ... + 18475.

It is an arithmetic number, because the mean of its divisors is an integer number (29472850).

Almost surely, 2^117858547 is an apocalyptic number.

117858547 is a deficient number, since it is larger than the sum of its proper divisors (32853).

117858547 is an equidigital number, since it uses as much as digits as its factorization.

117858547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32852.

The product of its digits is 313600, while the sum is 46.

The square root of 117858547 is about 10856.2676367157. The cubic root of 117858547 is about 490.2907437366.

The spelling of 117858547 in words is "one hundred seventeen million, eight hundred fifty-eight thousand, five hundred forty-seven".