49948721 has 4 divisors (see below), whose sum is σ = 50143332. Its totient is φ = 49754112.

The previous prime is 49948711. The next prime is 49948753. The reversal of 49948721 is 12784994.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12784994 = 2 ⋅6392497.

It can be written as a sum of positive squares in 2 ways, for example, as 40462321 + 9486400 = 6361^2 + 3080^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49948721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49948711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96920 + ... + 97433.

It is an arithmetic number, because the mean of its divisors is an integer number (12535833).

Almost surely, 2^49948721 is an apocalyptic number.

It is an amenable number.

49948721 is a deficient number, since it is larger than the sum of its proper divisors (194611).

49948721 is a wasteful number, since it uses less digits than its factorization.

49948721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194610.

The product of its digits is 145152, while the sum is 44.

The square root of 49948721 is about 7067.4409088439. The cubic root of 49948721 is about 368.2771644840.

The spelling of 49948721 in words is "forty-nine million, nine hundred forty-eight thousand, seven hundred twenty-one".