30217973 has 2 divisors, whose sum is σ = 30217974. Its totient is φ = 30217972.

The previous prime is 30217933. The next prime is 30217981. The reversal of 30217973 is 37971203.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30052324 + 165649 = 5482^2 + 407^2 .

It is an emirp because it is prime and its reverse (37971203) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30217973 - 2⁸ = 30217717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30217933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15108986 + 15108987.

It is an arithmetic number, because the mean of its divisors is an integer number (15108987).

Almost surely, 2^30217973 is an apocalyptic number.

It is an amenable number.

30217973 is a deficient number, since it is larger than the sum of its proper divisors (1).

30217973 is an equidigital number, since it uses as much as digits as its factorization.

30217973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7938, while the sum is 32.

The square root of 30217973 is about 5497.0876834921. The cubic root of 30217973 is about 311.4739828509.

The spelling of 30217973 in words is "thirty million, two hundred seventeen thousand, nine hundred seventy-three".