30706129 has 2 divisors, whose sum is σ = 30706130. Its totient is φ = 30706128.

The previous prime is 30706079. The next prime is 30706139. The reversal of 30706129 is 92160703.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25230529 + 5475600 = 5023^2 + 2340^2 .

It is an emirp because it is prime and its reverse (92160703) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30706129 - 2¹⁵ = 30673361 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30706097 and 30706106.

It is not a weakly prime, because it can be changed into another prime (30706139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15353064 + 15353065.

It is an arithmetic number, because the mean of its divisors is an integer number (15353065).

Almost surely, 2^30706129 is an apocalyptic number.

It is an amenable number.

30706129 is a deficient number, since it is larger than the sum of its proper divisors (1).

30706129 is an equidigital number, since it uses as much as digits as its factorization.

30706129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 30706129 is about 5541.3111264393. The cubic root of 30706129 is about 313.1422660641.

The spelling of 30706129 in words is "thirty million, seven hundred six thousand, one hundred twenty-nine".