30406721273 has 2 divisors, whose sum is σ = 30406721274. Its totient is φ = 30406721272.

The previous prime is 30406721243. The next prime is 30406721311. The reversal of 30406721273 is 37212760403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25962232384 + 4444488889 = 161128^2 + 66667^2 .

It is a cyclic number.

It is not a de Polignac number, because 30406721273 - 2¹⁰ = 30406720249 is a prime.

It is not a weakly prime, because it can be changed into another prime (30406721243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15203360636 + 15203360637.

It is an arithmetic number, because the mean of its divisors is an integer number (15203360637).

Almost surely, 2^30406721273 is an apocalyptic number.

It is an amenable number.

30406721273 is a deficient number, since it is larger than the sum of its proper divisors (1).

30406721273 is an equidigital number, since it uses as much as digits as its factorization.

30406721273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 35.

The spelling of 30406721273 in words is "thirty billion, four hundred six million, seven hundred twenty-one thousand, two hundred seventy-three".