30115873 has 2 divisors, whose sum is σ = 30115874. Its totient is φ = 30115872.

The previous prime is 30115871. The next prime is 30115907. The reversal of 30115873 is 37851103.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24770529 + 5345344 = 4977^2 + 2312^2 .

It is a cyclic number.

It is not a de Polignac number, because 30115873 - 2¹ = 30115871 is a prime.

Together with 30115871, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (30115871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15057936 + 15057937.

It is an arithmetic number, because the mean of its divisors is an integer number (15057937).

Almost surely, 2^30115873 is an apocalyptic number.

It is an amenable number.

30115873 is a deficient number, since it is larger than the sum of its proper divisors (1).

30115873 is an equidigital number, since it uses as much as digits as its factorization.

30115873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 30115873 is about 5487.7930901228. The cubic root of 30115873 is about 311.1227859234.

Adding to 30115873 its reverse (37851103), we get a palindrome (67966976).

The spelling of 30115873 in words is "thirty million, one hundred fifteen thousand, eight hundred seventy-three".