30549971 has 2 divisors, whose sum is σ = 30549972. Its totient is φ = 30549970.

The previous prime is 30549947. The next prime is 30549979. The reversal of 30549971 is 17994503.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30549971 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30549979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15274985 + 15274986.

It is an arithmetic number, because the mean of its divisors is an integer number (15274986).

Almost surely, 2^30549971 is an apocalyptic number.

30549971 is a deficient number, since it is larger than the sum of its proper divisors (1).

30549971 is an equidigital number, since it uses as much as digits as its factorization.

30549971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 30549971 is about 5527.2028187864. The cubic root of 30549971 is about 312.6105285824.

The spelling of 30549971 in words is "thirty million, five hundred forty-nine thousand, nine hundred seventy-one".