30406721309 has 8 divisors (see below), whose sum is σ = 31208156280. Its totient is φ = 29608134400.

The previous prime is 30406721273. The next prime is 30406721311. The reversal of 30406721309 is 90312760403.

It can be written as a sum of positive squares in 4 ways, for example, as 465610084 + 29941111225 = 21578^2 + 173035^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30406721309 - 2³² = 26111754013 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 (30406721329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 690374 + ... + 733095.

It is an arithmetic number, because the mean of its divisors is an integer number (3901019535).

Almost surely, 2^30406721309 is an apocalyptic number.

It is an amenable number.

30406721309 is a deficient number, since it is larger than the sum of its proper divisors (801434971).

30406721309 is a wasteful number, since it uses less digits than its factorization.

30406721309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1424031.

The product of its (nonzero) digits is 27216, while the sum is 35.

The spelling of 30406721309 in words is "thirty billion, four hundred six million, seven hundred twenty-one thousand, three hundred nine".