30745717 has 4 divisors (see below), whose sum is σ = 30761856. Its totient is φ = 30729580.

The previous prime is 30745691. The next prime is 30745751. The reversal of 30745717 is 71754703.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71754703 = 499 ⋅143797.

It is a cyclic number.

It is not a de Polignac number, because 30745717 - 2²³ = 22357109 is a prime.

It is a super-2 number, since 2×30745717² = 1890598227688178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30745787) 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, 4759 + ... + 9172.

It is an arithmetic number, because the mean of its divisors is an integer number (7690464).

Almost surely, 2^30745717 is an apocalyptic number.

It is an amenable number.

30745717 is a deficient number, since it is larger than the sum of its proper divisors (16139).

30745717 is a wasteful number, since it uses less digits than its factorization.

30745717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16138.

The product of its (nonzero) digits is 20580, while the sum is 34.

The square root of 30745717 is about 5544.8820546518. The cubic root of 30745717 is about 313.2767815800.

The spelling of 30745717 in words is "thirty million, seven hundred forty-five thousand, seven hundred seventeen".