8378799787 has 8 divisors (see below), whose sum is σ = 8576181504. Its totient is φ = 8181532968.

The previous prime is 8378799769. The next prime is 8378799829. The reversal of 8378799787 is 7879978738.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8378799787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8378790787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128898 + ... + 182680.

It is an arithmetic number, because the mean of its divisors is an integer number (1072022688).

Almost surely, 2^8378799787 is an apocalyptic number.

8378799787 is a deficient number, since it is larger than the sum of its proper divisors (197381717).

8378799787 is a wasteful number, since it uses less digits than its factorization.

8378799787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57449.

The product of its digits is 298722816, while the sum is 73.

The square root of 8378799787 is about 91535.7841884801. The cubic root of 8378799787 is about 2031.0811285162.

The spelling of 8378799787 in words is "eight billion, three hundred seventy-eight million, seven hundred ninety-nine thousand, seven hundred eighty-seven".