30747749 has 2 divisors, whose sum is σ = 30747750. Its totient is φ = 30747748.

The previous prime is 30747697. The next prime is 30747767. The reversal of 30747749 is 94774703.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21687649 + 9060100 = 4657^2 + 3010^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30747749 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30747799) 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, 15373874 + 15373875.

It is an arithmetic number, because the mean of its divisors is an integer number (15373875).

Almost surely, 2^30747749 is an apocalyptic number.

It is an amenable number.

30747749 is a deficient number, since it is larger than the sum of its proper divisors (1).

30747749 is an equidigital number, since it uses as much as digits as its factorization.

30747749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 148176, while the sum is 41.

The square root of 30747749 is about 5545.0652836554. The cubic root of 30747749 is about 313.2836829684.

The spelling of 30747749 in words is "thirty million, seven hundred forty-seven thousand, seven hundred forty-nine".