30749573 has 2 divisors, whose sum is σ = 30749574. Its totient is φ = 30749572.

The previous prime is 30749567. The next prime is 30749639. The reversal of 30749573 is 37594703.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30658369 + 91204 = 5537^2 + 302^2 .

It is an emirp because it is prime and its reverse (37594703) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30749573 is a prime.

It is a Sophie Germain 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 (30749273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15374786 + 15374787.

It is an arithmetic number, because the mean of its divisors is an integer number (15374787).

Almost surely, 2^30749573 is an apocalyptic number.

It is an amenable number.

30749573 is a deficient number, since it is larger than the sum of its proper divisors (1).

30749573 is an equidigital number, since it uses as much as digits as its factorization.

30749573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 79380, while the sum is 38.

The square root of 30749573 is about 5545.2297517776. The cubic root of 30749573 is about 313.2898776564.

The spelling of 30749573 in words is "thirty million, seven hundred forty-nine thousand, five hundred seventy-three".