30750049 has 4 divisors (see below), whose sum is σ = 33545520. Its totient is φ = 27954580.

The previous prime is 30750019. The next prime is 30750053. The reversal of 30750049 is 94005703.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30750049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30749999 and 30750026.

It is not an unprimeable number, because it can be changed into a prime (30750019) 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, 1397719 + ... + 1397740.

It is an arithmetic number, because the mean of its divisors is an integer number (8386380).

Almost surely, 2^30750049 is an apocalyptic number.

It is an amenable number.

30750049 is a deficient number, since it is larger than the sum of its proper divisors (2795471).

30750049 is a wasteful number, since it uses less digits than its factorization.

30750049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2795470.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 30750049 is about 5545.2726713842. The cubic root of 30750049 is about 313.2914942123.

The spelling of 30750049 in words is "thirty million, seven hundred fifty thousand, forty-nine".