30797617 has 2 divisors, whose sum is σ = 30797618. Its totient is φ = 30797616.

The previous prime is 30797603. The next prime is 30797629. The reversal of 30797617 is 71679703.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27415696 + 3381921 = 5236^2 + 1839^2 .

It is an emirp because it is prime and its reverse (71679703) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30797617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30797617.

It is not a weakly prime, because it can be changed into another prime (30797677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15398808 + 15398809.

It is an arithmetic number, because the mean of its divisors is an integer number (15398809).

Almost surely, 2^30797617 is an apocalyptic number.

It is an amenable number.

30797617 is a deficient number, since it is larger than the sum of its proper divisors (1).

30797617 is an equidigital number, since it uses as much as digits as its factorization.

30797617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55566, while the sum is 40.

The square root of 30797617 is about 5549.5600726544. The cubic root of 30797617 is about 313.4529570658.

The spelling of 30797617 in words is "thirty million, seven hundred ninety-seven thousand, six hundred seventeen".