30512197 has 2 divisors, whose sum is σ = 30512198. Its totient is φ = 30512196.

The previous prime is 30512177. The next prime is 30512219. The reversal of 30512197 is 79121503.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28665316 + 1846881 = 5354^2 + 1359^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30512197 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 (30512107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15256098 + 15256099.

It is an arithmetic number, because the mean of its divisors is an integer number (15256099).

Almost surely, 2^30512197 is an apocalyptic number.

It is an amenable number.

30512197 is a deficient number, since it is larger than the sum of its proper divisors (1).

30512197 is an equidigital number, since it uses as much as digits as its factorization.

30512197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 30512197 is about 5523.7846627109. The cubic root of 30512197 is about 312.4816313470.

The spelling of 30512197 in words is "thirty million, five hundred twelve thousand, one hundred ninety-seven".