29729894971 has 8 divisors (see below), whose sum is σ = 34306897664. Its totient is φ = 25235361000.

The previous prime is 29729894917. The next prime is 29729894981. The reversal of 29729894971 is 17949892792.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29729894971 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 29729894897 and 29729894906.

It is not an unprimeable number, because it can be changed into a prime (29729894911) 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 7 ways as a sum of consecutive naturals, for example, 20616405 + ... + 20617846.

It is an arithmetic number, because the mean of its divisors is an integer number (4288362208).

Almost surely, 2^29729894971 is an apocalyptic number.

29729894971 is a deficient number, since it is larger than the sum of its proper divisors (4577002693).

29729894971 is a wasteful number, since it uses less digits than its factorization.

29729894971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41234361.

The product of its digits is 41150592, while the sum is 67.

The spelling of 29729894971 in words is "twenty-nine billion, seven hundred twenty-nine million, eight hundred ninety-four thousand, nine hundred seventy-one".