30745811 has 4 divisors (see below), whose sum is σ = 30988032. Its totient is φ = 30503592.

The previous prime is 30745807. The next prime is 30745889. The reversal of 30745811 is 11854703.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11854703 = 7 ⋅1693529.

It is a cyclic number.

It is not a de Polignac number, because 30745811 - 2² = 30745807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30705811) 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 in 3 ways as a sum of consecutive naturals, for example, 120920 + ... + 121173.

It is an arithmetic number, because the mean of its divisors is an integer number (7747008).

Almost surely, 2^30745811 is an apocalyptic number.

30745811 is a deficient number, since it is larger than the sum of its proper divisors (242221).

30745811 is a wasteful number, since it uses less digits than its factorization.

30745811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242220.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 30745811 is about 5544.8905309303. The cubic root of 30745811 is about 313.2771008439.

The spelling of 30745811 in words is "thirty million, seven hundred forty-five thousand, eight hundred eleven".