30105389 has 2 divisors, whose sum is σ = 30105390. Its totient is φ = 30105388.

The previous prime is 30105353. The next prime is 30105401. The reversal of 30105389 is 98350103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30085225 + 20164 = 5485^2 + 142^2 .

It is a cyclic number.

It is not a de Polignac number, because 30105389 - 2¹² = 30101293 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 (30165389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15052694 + 15052695.

It is an arithmetic number, because the mean of its divisors is an integer number (15052695).

Almost surely, 2^30105389 is an apocalyptic number.

It is an amenable number.

30105389 is a deficient number, since it is larger than the sum of its proper divisors (1).

30105389 is an equidigital number, since it uses as much as digits as its factorization.

30105389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 30105389 is about 5486.8377960352. The cubic root of 30105389 is about 311.0866788306.

The spelling of 30105389 in words is "thirty million, one hundred five thousand, three hundred eighty-nine".