30360821 has 2 divisors, whose sum is σ = 30360822. Its totient is φ = 30360820.

The previous prime is 30360791. The next prime is 30360853. The reversal of 30360821 is 12806303.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26635921 + 3724900 = 5161^2 + 1930^2 .

It is a cyclic number.

It is not a de Polignac number, because 30360821 - 2¹⁴ = 30344437 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30360721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15180410 + 15180411.

It is an arithmetic number, because the mean of its divisors is an integer number (15180411).

Almost surely, 2^30360821 is an apocalyptic number.

It is an amenable number.

30360821 is a deficient number, since it is larger than the sum of its proper divisors (1).

30360821 is an equidigital number, since it uses as much as digits as its factorization.

30360821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 30360821 is about 5510.0654261088. The cubic root of 30360821 is about 311.9640169164.

The spelling of 30360821 in words is "thirty million, three hundred sixty thousand, eight hundred twenty-one".