30145693 has 2 divisors, whose sum is σ = 30145694. Its totient is φ = 30145692.

The previous prime is 30145679. The next prime is 30145699. The reversal of 30145693 is 39654103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20548089 + 9597604 = 4533^2 + 3098^2 .

It is an emirp because it is prime and its reverse (39654103) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30145693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30145699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15072846 + 15072847.

It is an arithmetic number, because the mean of its divisors is an integer number (15072847).

Almost surely, 2^30145693 is an apocalyptic number.

It is an amenable number.

30145693 is a deficient number, since it is larger than the sum of its proper divisors (1).

30145693 is an equidigital number, since it uses as much as digits as its factorization.

30145693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 30145693 is about 5490.5093570633. The cubic root of 30145693 is about 311.2254407701.

Adding to 30145693 its reverse (39654103), we get a palindrome (69799796).

The spelling of 30145693 in words is "thirty million, one hundred forty-five thousand, six hundred ninety-three".