117542787 has 4 divisors (see below), whose sum is σ = 156723720. Its totient is φ = 78361856.

The previous prime is 117542749. The next prime is 117542801. The reversal of 117542787 is 787245711.

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 117542787 - 2¹⁴ = 117526403 is a prime.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (117542717) 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, 19590462 + ... + 19590467.

It is an arithmetic number, because the mean of its divisors is an integer number (39180930).

Almost surely, 2^117542787 is an apocalyptic number.

117542787 is a deficient number, since it is larger than the sum of its proper divisors (39180933).

117542787 is an equidigital number, since it uses as much as digits as its factorization.

117542787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39180932.

The product of its digits is 109760, while the sum is 42.

The square root of 117542787 is about 10841.7151318415. The cubic root of 117542787 is about 489.8524989880.

It can be divided in two parts, 11754 and 2787, that added together give a palindrome (14541).

The spelling of 117542787 in words is "one hundred seventeen million, five hundred forty-two thousand, seven hundred eighty-seven".