29800872173 has 4 divisors (see below), whose sum is σ = 30074274780. Its totient is φ = 29527469568.

The previous prime is 29800872169. The next prime is 29800872191. The reversal of 29800872173 is 37127800892.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11543998249 + 18256873924 = 107443^2 + 135118^2 .

It is a cyclic number.

It is not a de Polignac number, because 29800872173 - 2² = 29800872169 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29800877173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136701140 + ... + 136701357.

It is an arithmetic number, because the mean of its divisors is an integer number (7518568695).

Almost surely, 2^29800872173 is an apocalyptic number.

It is an amenable number.

29800872173 is a deficient number, since it is larger than the sum of its proper divisors (273402607).

29800872173 is a wasteful number, since it uses less digits than its factorization.

29800872173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273402606.

The product of its (nonzero) digits is 338688, while the sum is 47.

The spelling of 29800872173 in words is "twenty-nine billion, eight hundred million, eight hundred seventy-two thousand, one hundred seventy-three".