13931041947 has 4 divisors (see below), whose sum is σ = 18574722600. Its totient is φ = 9287361296.

The previous prime is 13931041853. The next prime is 13931041967. The reversal of 13931041947 is 74914013931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74914013931 = 3 ⋅24971337977.

It is a cyclic number.

It is not a de Polignac number, because 13931041947 - 2⁷ = 13931041819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13931041899 and 13931041908.

It is not an unprimeable number, because it can be changed into a prime (13931041967) 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, 2321840322 + ... + 2321840327.

It is an arithmetic number, because the mean of its divisors is an integer number (4643680650).

Almost surely, 2^13931041947 is an apocalyptic number.

13931041947 is a deficient number, since it is larger than the sum of its proper divisors (4643680653).

13931041947 is an equidigital number, since it uses as much as digits as its factorization.

13931041947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4643680652.

The product of its (nonzero) digits is 81648, while the sum is 42.

The spelling of 13931041947 in words is "thirteen billion, nine hundred thirty-one million, forty-one thousand, nine hundred forty-seven".