29290441721 has 2 divisors, whose sum is σ = 29290441722. Its totient is φ = 29290441720.

The previous prime is 29290441717. The next prime is 29290441793. The reversal of 29290441721 is 12714409292.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28798090000 + 492351721 = 169700^2 + 22189^2 .

It is a cyclic number.

It is not a de Polignac number, because 29290441721 - 2² = 29290441717 is a prime.

It is a super-2 number, since 2×29290441721² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (29290441321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14645220860 + 14645220861.

It is an arithmetic number, because the mean of its divisors is an integer number (14645220861).

Almost surely, 2^29290441721 is an apocalyptic number.

It is an amenable number.

29290441721 is a deficient number, since it is larger than the sum of its proper divisors (1).

29290441721 is an equidigital number, since it uses as much as digits as its factorization.

29290441721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The spelling of 29290441721 in words is "twenty-nine billion, two hundred ninety million, four hundred forty-one thousand, seven hundred twenty-one".