49943749 has 4 divisors (see below), whose sum is σ = 50167936. Its totient is φ = 49719564.

The previous prime is 49943711. The next prime is 49943767. The reversal of 49943749 is 94734994.

49943749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 94734994 = 2 ⋅47367497.

It is a cyclic number.

It is not a de Polignac number, because 49943749 - 2⁹ = 49943237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49943779) 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, 111759 + ... + 112204.

It is an arithmetic number, because the mean of its divisors is an integer number (12541984).

Almost surely, 2^49943749 is an apocalyptic number.

It is an amenable number.

49943749 is a deficient number, since it is larger than the sum of its proper divisors (224187).

49943749 is a wasteful number, since it uses less digits than its factorization.

49943749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224186.

The product of its digits is 979776, while the sum is 49.

The square root of 49943749 is about 7067.0891461761. The cubic root of 49943749 is about 368.2649443859.

The spelling of 49943749 in words is "forty-nine million, nine hundred forty-three thousand, seven hundred forty-nine".