30800129 has 4 divisors (see below), whose sum is σ = 30910020. Its totient is φ = 30690240.

The previous prime is 30800123. The next prime is 30800137. The reversal of 30800129 is 92100803.

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 25230529 + 5569600 = 5023^2 + 2360^2 .

It is a cyclic number.

It is not a de Polignac number, because 30800129 - 2⁴ = 30800113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30800123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54524 + ... + 55085.

It is an arithmetic number, because the mean of its divisors is an integer number (7727505).

Almost surely, 2^30800129 is an apocalyptic number.

It is an amenable number.

30800129 is a deficient number, since it is larger than the sum of its proper divisors (109891).

30800129 is a wasteful number, since it uses less digits than its factorization.

30800129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109890.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 30800129 is about 5549.7863922857. The cubic root of 30800129 is about 313.4614790717.

The spelling of 30800129 in words is "thirty million, eight hundred thousand, one hundred twenty-nine".