78749100347 has 4 divisors (see below), whose sum is σ = 78750411960. Its totient is φ = 78747788736.

The previous prime is 78749100343. The next prime is 78749100377. The reversal of 78749100347 is 74300194787.

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 78749100347 - 2² = 78749100343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78749100295 and 78749100304.

It is not an unprimeable number, because it can be changed into a prime (78749100341) 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, 561197 + ... + 687342.

It is an arithmetic number, because the mean of its divisors is an integer number (19687602990).

Almost surely, 2^78749100347 is an apocalyptic number.

78749100347 is a deficient number, since it is larger than the sum of its proper divisors (1311613).

78749100347 is a wasteful number, since it uses less digits than its factorization.

78749100347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311612.

The product of its (nonzero) digits is 1185408, while the sum is 50.

The spelling of 78749100347 in words is "seventy-eight billion, seven hundred forty-nine million, one hundred thousand, three hundred forty-seven".