30145729 has 2 divisors, whose sum is σ = 30145730. Its totient is φ = 30145728.

The previous prime is 30145699. The next prime is 30145751. The reversal of 30145729 is 92754103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16418704 + 13727025 = 4052^2 + 3705^2 .

It is a cyclic number.

It is not a de Polignac number, because 30145729 - 2⁷ = 30145601 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30145729.

It is not a weakly prime, because it can be changed into another prime (30155729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15072864 + 15072865.

It is an arithmetic number, because the mean of its divisors is an integer number (15072865).

Almost surely, 2^30145729 is an apocalyptic number.

It is an amenable number.

30145729 is a deficient number, since it is larger than the sum of its proper divisors (1).

30145729 is an equidigital number, since it uses as much as digits as its factorization.

30145729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 30145729 is about 5490.5126354467. The cubic root of 30145729 is about 311.2255646586.

The spelling of 30145729 in words is "thirty million, one hundred forty-five thousand, seven hundred twenty-nine".