30840307 has 2 divisors, whose sum is σ = 30840308. Its totient is φ = 30840306.

The previous prime is 30840283. The next prime is 30840317. The reversal of 30840307 is 70304803.

It is a strong prime.

It is an emirp because it is prime and its reverse (70304803) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30840307 is a prime.

It is a super-2 number, since 2×30840307² = 1902249071708498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30840317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15420153 + 15420154.

It is an arithmetic number, because the mean of its divisors is an integer number (15420154).

Almost surely, 2^30840307 is an apocalyptic number.

30840307 is a deficient number, since it is larger than the sum of its proper divisors (1).

30840307 is an equidigital number, since it uses as much as digits as its factorization.

30840307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 30840307 is about 5553.4049915345. The cubic root of 30840307 is about 313.5977207411.

The spelling of 30840307 in words is "thirty million, eight hundred forty thousand, three hundred seven".