30871249 has 2 divisors, whose sum is σ = 30871250. Its totient is φ = 30871248.

The previous prime is 30871229. The next prime is 30871259. The reversal of 30871249 is 94217803.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18318400 + 12552849 = 4280^2 + 3543^2 .

It is a cyclic number.

It is not a de Polignac number, because 30871249 - 2⁹ = 30870737 is a prime.

It is not a weakly prime, because it can be changed into another prime (30871229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15435624 + 15435625.

It is an arithmetic number, because the mean of its divisors is an integer number (15435625).

Almost surely, 2^30871249 is an apocalyptic number.

It is an amenable number.

30871249 is a deficient number, since it is larger than the sum of its proper divisors (1).

30871249 is an equidigital number, since it uses as much as digits as its factorization.

30871249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 30871249 is about 5556.1901515337. The cubic root of 30871249 is about 313.7025629461.

The spelling of 30871249 in words is "thirty million, eight hundred seventy-one thousand, two hundred forty-nine".