29440939309 has 2 divisors, whose sum is σ = 29440939310. Its totient is φ = 29440939308.

The previous prime is 29440939247. The next prime is 29440939357. The reversal of 29440939309 is 90393904492.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27954836809 + 1486102500 = 167197^2 + 38550^2 .

It is a cyclic number.

It is not a de Polignac number, because 29440939309 - 2¹⁹ = 29440415021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29440939369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14720469654 + 14720469655.

It is an arithmetic number, because the mean of its divisors is an integer number (14720469655).

Almost surely, 2^29440939309 is an apocalyptic number.

It is an amenable number.

29440939309 is a deficient number, since it is larger than the sum of its proper divisors (1).

29440939309 is an equidigital number, since it uses as much as digits as its factorization.

29440939309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1889568, while the sum is 52.

The spelling of 29440939309 in words is "twenty-nine billion, four hundred forty million, nine hundred thirty-nine thousand, three hundred nine".