30872797 has 2 divisors, whose sum is σ = 30872798. Its totient is φ = 30872796.

The previous prime is 30872783. The next prime is 30872819. The reversal of 30872797 is 79727803.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25948836 + 4923961 = 5094^2 + 2219^2 .

It is an emirp because it is prime and its reverse (79727803) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30872797 - 2⁷ = 30872669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30872707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15436398 + 15436399.

It is an arithmetic number, because the mean of its divisors is an integer number (15436399).

Almost surely, 2^30872797 is an apocalyptic number.

It is an amenable number.

30872797 is a deficient number, since it is larger than the sum of its proper divisors (1).

30872797 is an equidigital number, since it uses as much as digits as its factorization.

30872797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 148176, while the sum is 43.

The square root of 30872797 is about 5556.3294538751. The cubic root of 30872797 is about 313.7078062654.

The spelling of 30872797 in words is "thirty million, eight hundred seventy-two thousand, seven hundred ninety-seven".