30049021 has 2 divisors, whose sum is σ = 30049022. Its totient is φ = 30049020.

The previous prime is 30049009. The next prime is 30049037. The reversal of 30049021 is 12094003.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29539225 + 509796 = 5435^2 + 714^2 .

It is an emirp because it is prime and its reverse (12094003) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30049021 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30049021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30041021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15024510 + 15024511.

It is an arithmetic number, because the mean of its divisors is an integer number (15024511).

Almost surely, 2^30049021 is an apocalyptic number.

It is an amenable number.

30049021 is a deficient number, since it is larger than the sum of its proper divisors (1).

30049021 is an equidigital number, since it uses as much as digits as its factorization.

30049021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 30049021 is about 5481.6987330571. The cubic root of 30049021 is about 310.8924025451.

The spelling of 30049021 in words is "thirty million, forty-nine thousand, twenty-one".