30750249 has 4 divisors (see below), whose sum is σ = 41000336. Its totient is φ = 20500164.

The previous prime is 30750193. The next prime is 30750259. The reversal of 30750249 is 94205703.

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: 94205703 = 3 ⋅31401901.

It is not a de Polignac number, because 30750249 - 2⁸ = 30749993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30750259) 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, 5125039 + ... + 5125044.

It is an arithmetic number, because the mean of its divisors is an integer number (10250084).

Almost surely, 2^30750249 is an apocalyptic number.

It is an amenable number.

30750249 is a deficient number, since it is larger than the sum of its proper divisors (10250087).

30750249 is a wasteful number, since it uses less digits than its factorization.

30750249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10250086.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 30750249 is about 5545.2907047332. The cubic root of 30750249 is about 313.2921734325.

The spelling of 30750249 in words is "thirty million, seven hundred fifty thousand, two hundred forty-nine".