30745745 has 4 divisors (see below), whose sum is σ = 36894900. Its totient is φ = 24596592.

The previous prime is 30745691. The next prime is 30745751. The reversal of 30745745 is 54754703.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5303809 + 25441936 = 2303^2 + 5044^2 .

It is a cyclic number.

It is not a de Polignac number, because 30745745 - 2¹² = 30741649 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3074570 + ... + 3074579.

It is an arithmetic number, because the mean of its divisors is an integer number (9223725).

Almost surely, 2^30745745 is an apocalyptic number.

It is an amenable number.

30745745 is a deficient number, since it is larger than the sum of its proper divisors (6149155).

30745745 is an equidigital number, since it uses as much as digits as its factorization.

30745745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6149154.

The product of its (nonzero) digits is 58800, while the sum is 35.

The square root of 30745745 is about 5544.8845795021. The cubic root of 30745745 is about 313.2768766800.

The spelling of 30745745 in words is "thirty million, seven hundred forty-five thousand, seven hundred forty-five".