29745287309 has 2 divisors, whose sum is σ = 29745287310. Its totient is φ = 29745287308.

The previous prime is 29745287267. The next prime is 29745287357. The reversal of 29745287309 is 90378254792.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27956843209 + 1788444100 = 167203^2 + 42290^2 .

It is a cyclic number.

It is not a de Polignac number, because 29745287309 - 2¹² = 29745283213 is a prime.

It is a super-2 number, since 2×29745287309² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29745187309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14872643654 + 14872643655.

It is an arithmetic number, because the mean of its divisors is an integer number (14872643655).

Almost surely, 2^29745287309 is an apocalyptic number.

It is an amenable number.

29745287309 is a deficient number, since it is larger than the sum of its proper divisors (1).

29745287309 is an equidigital number, since it uses as much as digits as its factorization.

29745287309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7620480, while the sum is 56.

The spelling of 29745287309 in words is "twenty-nine billion, seven hundred forty-five million, two hundred eighty-seven thousand, three hundred nine".