29249827872721 has 3 divisors (see below), whose sum is σ = 29249833281033. Its totient is φ = 29249822464410.

The previous prime is 29249827872709. The next prime is 29249827872779. The reversal of 29249827872721 is 12727872894292.

The square root of 29249827872721 is 5408311.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 29249827872721 - 2¹³ = 29249827864529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29249827872521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2704156 + ... + 8112466.

It is an arithmetic number, because the mean of its divisors is an integer number (9749944427011).

Almost surely, 2^{29249827872721} is an apocalyptic number.

29249827872721 is the 5408311-st square number.

29249827872721 is the 2704156-th centered octagonal number.

It is an amenable number.

29249827872721 is a deficient number, since it is larger than the sum of its proper divisors (5408312).

29249827872721 is an frugal number, since it uses more digits than its factorization.

29249827872721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10816622 (or 5408311 counting only the distinct ones).

The product of its digits is 227598336, while the sum is 70.

The spelling of 29249827872721 in words is "twenty-nine trillion, two hundred forty-nine billion, eight hundred twenty-seven million, eight hundred seventy-two thousand, seven hundred twenty-one".