30745691 has 2 divisors, whose sum is σ = 30745692. Its totient is φ = 30745690.

The previous prime is 30745669. The next prime is 30745751. The reversal of 30745691 is 19654703.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30745691 - 2¹⁸ = 30483547 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30745651) 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, 15372845 + 15372846.

It is an arithmetic number, because the mean of its divisors is an integer number (15372846).

Almost surely, 2^30745691 is an apocalyptic number.

30745691 is a deficient number, since it is larger than the sum of its proper divisors (1).

30745691 is an equidigital number, since it uses as much as digits as its factorization.

30745691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 30745691 is about 5544.8797101470. The cubic root of 30745691 is about 313.2766932729.

The spelling of 30745691 in words is "thirty million, seven hundred forty-five thousand, six hundred ninety-one".