29381447971 has 4 divisors (see below), whose sum is σ = 29384196192. Its totient is φ = 29378699752.

The previous prime is 29381447951. The next prime is 29381447999. The reversal of 29381447971 is 17974418392.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29381447971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29381447951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1358011 + ... + 1379476.

It is an arithmetic number, because the mean of its divisors is an integer number (7346049048).

Almost surely, 2^29381447971 is an apocalyptic number.

29381447971 is a deficient number, since it is larger than the sum of its proper divisors (2748221).

29381447971 is a wasteful number, since it uses less digits than its factorization.

29381447971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2748220.

The product of its digits is 3048192, while the sum is 55.

The spelling of 29381447971 in words is "twenty-nine billion, three hundred eighty-one million, four hundred forty-seven thousand, nine hundred seventy-one".