30870013 has 2 divisors, whose sum is σ = 30870014. Its totient is φ = 30870012.

The previous prime is 30869989. The next prime is 30870029. The reversal of 30870013 is 31007803.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16867449 + 14002564 = 4107^2 + 3742^2 .

It is an emirp because it is prime and its reverse (31007803) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30870013 - 2⁵ = 30869981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30870043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15435006 + 15435007.

It is an arithmetic number, because the mean of its divisors is an integer number (15435007).

Almost surely, 2^30870013 is an apocalyptic number.

It is an amenable number.

30870013 is a deficient number, since it is larger than the sum of its proper divisors (1).

30870013 is an equidigital number, since it uses as much as digits as its factorization.

30870013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 30870013 is about 5556.0789231256. The cubic root of 30870013 is about 313.6983762940.

Adding to 30870013 its reverse (31007803), we get a palindrome (61877816).

The spelling of 30870013 in words is "thirty million, eight hundred seventy thousand, thirteen".