29973602809 has 2 divisors, whose sum is σ = 29973602810. Its totient is φ = 29973602808.

The previous prime is 29973602753. The next prime is 29973602821. The reversal of 29973602809 is 90820637992.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18605778409 + 11367824400 = 136403^2 + 106620^2 .

It is a cyclic number.

It is not a de Polignac number, because 29973602809 - 2²¹ = 29971505657 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 29973602809.

It is not a weakly prime, because it can be changed into another prime (29973602839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14986801404 + 14986801405.

It is an arithmetic number, because the mean of its divisors is an integer number (14986801405).

Almost surely, 2^29973602809 is an apocalyptic number.

It is an amenable number.

29973602809 is a deficient number, since it is larger than the sum of its proper divisors (1).

29973602809 is an equidigital number, since it uses as much as digits as its factorization.

29973602809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2939328, while the sum is 55.

The spelling of 29973602809 in words is "twenty-nine billion, nine hundred seventy-three million, six hundred two thousand, eight hundred nine".