117113987 has 4 divisors (see below), whose sum is σ = 118251120. Its totient is φ = 115976856.

The previous prime is 117113963. The next prime is 117114007. The reversal of 117113987 is 789311711.

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 117113987 - 2²² = 112919683 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 117113987.

It is not an unprimeable number, because it can be changed into a prime (117113957) 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, 568412 + ... + 568617.

It is an arithmetic number, because the mean of its divisors is an integer number (29562780).

Almost surely, 2^117113987 is an apocalyptic number.

117113987 is a deficient number, since it is larger than the sum of its proper divisors (1137133).

117113987 is a wasteful number, since it uses less digits than its factorization.

117113987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137132.

The product of its digits is 10584, while the sum is 38.

The square root of 117113987 is about 10821.9215946153. The cubic root of 117113987 is about 489.2561071054.

The spelling of 117113987 in words is "one hundred seventeen million, one hundred thirteen thousand, nine hundred eighty-seven".