29873434929721 has 2 divisors, whose sum is σ = 29873434929722. Its totient is φ = 29873434929720.

The previous prime is 29873434929659. The next prime is 29873434929739. The reversal of 29873434929721 is 12792943437892.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26554439610000 + 3318995319721 = 5153100^2 + 1821811^2 .

It is a cyclic number.

It is not a de Polignac number, because 29873434929721 - 2²⁵ = 29873401375289 is a prime.

It is a super-2 number, since 2×29873434929721² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (29873434929521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14936717464860 + 14936717464861.

It is an arithmetic number, because the mean of its divisors is an integer number (14936717464861).

Almost surely, 2^{29873434929721} is an apocalyptic number.

It is an amenable number.

29873434929721 is a deficient number, since it is larger than the sum of its proper divisors (1).

29873434929721 is an equidigital number, since it uses as much as digits as its factorization.

29873434929721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 329204736, while the sum is 70.

The spelling of 29873434929721 in words is "twenty-nine trillion, eight hundred seventy-three billion, four hundred thirty-four million, nine hundred twenty-nine thousand, seven hundred twenty-one".