30717149 has 2 divisors, whose sum is σ = 30717150. Its totient is φ = 30717148.

The previous prime is 30717139. The next prime is 30717151. The reversal of 30717149 is 94171703.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23863225 + 6853924 = 4885^2 + 2618^2 .

It is an emirp because it is prime and its reverse (94171703) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30717149 is a prime.

Together with 30717151, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30717139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15358574 + 15358575.

It is an arithmetic number, because the mean of its divisors is an integer number (15358575).

Almost surely, 2^30717149 is an apocalyptic number.

It is an amenable number.

30717149 is a deficient number, since it is larger than the sum of its proper divisors (1).

30717149 is an equidigital number, since it uses as much as digits as its factorization.

30717149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 30717149 is about 5542.3053867502. The cubic root of 30717149 is about 313.1797223760.

The spelling of 30717149 in words is "thirty million, seven hundred seventeen thousand, one hundred forty-nine".