13867978947 has 4 divisors (see below), whose sum is σ = 18490638600. Its totient is φ = 9245319296.

The previous prime is 13867978931. The next prime is 13867978963. The reversal of 13867978947 is 74987976831.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (13867978931) and next prime (13867978963).

It is a cyclic number.

It is not a de Polignac number, because 13867978947 - 2⁴ = 13867978931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13867978967) 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, 2311329822 + ... + 2311329827.

It is an arithmetic number, because the mean of its divisors is an integer number (4622659650).

Almost surely, 2^13867978947 is an apocalyptic number.

13867978947 is a deficient number, since it is larger than the sum of its proper divisors (4622659653).

13867978947 is an equidigital number, since it uses as much as digits as its factorization.

13867978947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4622659652.

The product of its digits is 128024064, while the sum is 69.

The spelling of 13867978947 in words is "thirteen billion, eight hundred sixty-seven million, nine hundred seventy-eight thousand, nine hundred forty-seven".