8123646047 has 4 divisors (see below), whose sum is σ = 8862159336. Its totient is φ = 7385132760.

The previous prime is 8123646031. The next prime is 8123646053. The reversal of 8123646047 is 7406463218.

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 8123646047 - 2⁴ = 8123646031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8123645995 and 8123646013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8123646247) 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, 369256628 + ... + 369256649.

It is an arithmetic number, because the mean of its divisors is an integer number (2215539834).

Almost surely, 2^8123646047 is an apocalyptic number.

8123646047 is a deficient number, since it is larger than the sum of its proper divisors (738513289).

8123646047 is a wasteful number, since it uses less digits than its factorization.

8123646047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738513288.

The product of its (nonzero) digits is 193536, while the sum is 41.

The square root of 8123646047 is about 90131.2711937427. The cubic root of 8123646047 is about 2010.2512038869.

The spelling of 8123646047 in words is "eight billion, one hundred twenty-three million, six hundred forty-six thousand, forty-seven".