117988783 has 4 divisors (see below), whose sum is σ = 128715048. Its totient is φ = 107262520.

The previous prime is 117988747. The next prime is 117988807. The reversal of 117988783 is 387889711.

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 117988783 - 2²¹ = 115891631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 117988783.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117980783) 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, 5363116 + ... + 5363137.

It is an arithmetic number, because the mean of its divisors is an integer number (32178762).

Almost surely, 2^117988783 is an apocalyptic number.

117988783 is a deficient number, since it is larger than the sum of its proper divisors (10726265).

117988783 is a wasteful number, since it uses less digits than its factorization.

117988783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10726264.

The product of its digits is 677376, while the sum is 52.

The square root of 117988783 is about 10862.2641746553. The cubic root of 117988783 is about 490.4712708786.

The spelling of 117988783 in words is "one hundred seventeen million, nine hundred eighty-eight thousand, seven hundred eighty-three".