30730309 has 2 divisors, whose sum is σ = 30730310. Its totient is φ = 30730308.

The previous prime is 30730283. The next prime is 30730319. The reversal of 30730309 is 90303703.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27857284 + 2873025 = 5278^2 + 1695^2 .

It is a cyclic number.

It is not a de Polignac number, because 30730309 - 2¹³ = 30722117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30730319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15365154 + 15365155.

It is an arithmetic number, because the mean of its divisors is an integer number (15365155).

Almost surely, 2^30730309 is an apocalyptic number.

It is an amenable number.

30730309 is a deficient number, since it is larger than the sum of its proper divisors (1).

30730309 is an equidigital number, since it uses as much as digits as its factorization.

30730309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1701, while the sum is 25.

The square root of 30730309 is about 5543.4924912008. The cubic root of 30730309 is about 313.2244406832.

The spelling of 30730309 in words is "thirty million, seven hundred thirty thousand, three hundred nine".