49673821 has 4 divisors (see below), whose sum is σ = 49948444. Its totient is φ = 49399200.

The previous prime is 49673791. The next prime is 49673843. The reversal of 49673821 is 12837694.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18369796 + 31304025 = 4286^2 + 5595^2 .

It is a cyclic number.

It is not a de Polignac number, because 49673821 - 2¹⁷ = 49542749 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 (49673861) 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, 137040 + ... + 137401.

It is an arithmetic number, because the mean of its divisors is an integer number (12487111).

Almost surely, 2^49673821 is an apocalyptic number.

It is an amenable number.

49673821 is a deficient number, since it is larger than the sum of its proper divisors (274623).

49673821 is a wasteful number, since it uses less digits than its factorization.

49673821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274622.

The product of its digits is 72576, while the sum is 40.

The square root of 49673821 is about 7047.9657348770. The cubic root of 49673821 is about 367.6002990309.

The spelling of 49673821 in words is "forty-nine million, six hundred seventy-three thousand, eight hundred twenty-one".