117643587 has 8 divisors (see below), whose sum is σ = 166085136. Its totient is φ = 73815552.

The previous prime is 117643583. The next prime is 117643601. The reversal of 117643587 is 785346711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 117643587 - 2² = 117643583 is a prime.

It is not an unprimeable number, because it can be changed into a prime (117643583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1153318 + ... + 1153419.

It is an arithmetic number, because the mean of its divisors is an integer number (20760642).

Almost surely, 2^117643587 is an apocalyptic number.

117643587 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

117643587 is a deficient number, since it is larger than the sum of its proper divisors (48441549).

117643587 is a wasteful number, since it uses less digits than its factorization.

117643587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2306757.

The product of its digits is 141120, while the sum is 42.

The square root of 117643587 is about 10846.3628465952. The cubic root of 117643587 is about 489.9924849604.

It can be divided in two parts, 11764 and 3587, that added together give a palindrome (15351).

The spelling of 117643587 in words is "one hundred seventeen million, six hundred forty-three thousand, five hundred eighty-seven".