29221047749 has 2 divisors, whose sum is σ = 29221047750. Its totient is φ = 29221047748.

The previous prime is 29221047683. The next prime is 29221047833. The reversal of 29221047749 is 94774012292.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28363612225 + 857435524 = 168415^2 + 29282^2 .

It is a cyclic number.

It is not a de Polignac number, because 29221047749 - 2¹² = 29221043653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29221047049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14610523874 + 14610523875.

It is an arithmetic number, because the mean of its divisors is an integer number (14610523875).

Almost surely, 2^29221047749 is an apocalyptic number.

It is an amenable number.

29221047749 is a deficient number, since it is larger than the sum of its proper divisors (1).

29221047749 is an equidigital number, since it uses as much as digits as its factorization.

29221047749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 47.

The spelling of 29221047749 in words is "twenty-nine billion, two hundred twenty-one million, forty-seven thousand, seven hundred forty-nine".