30145439 has 2 divisors, whose sum is σ = 30145440. Its totient is φ = 30145438.

The previous prime is 30145333. The next prime is 30145447. The reversal of 30145439 is 93454103.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30145439 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30145469) 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 as a sum of consecutive naturals, namely, 15072719 + 15072720.

It is an arithmetic number, because the mean of its divisors is an integer number (15072720).

Almost surely, 2^30145439 is an apocalyptic number.

30145439 is a deficient number, since it is larger than the sum of its proper divisors (1).

30145439 is an equidigital number, since it uses as much as digits as its factorization.

30145439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 30145439 is about 5490.4862261916. The cubic root of 30145439 is about 311.2245666653.

The spelling of 30145439 in words is "thirty million, one hundred forty-five thousand, four hundred thirty-nine".