49723821 has 16 divisors (see below), whose sum is σ = 84188800. Its totient is φ = 28413504.

The previous prime is 49723799. The next prime is 49723823. The reversal of 49723821 is 12832794.

It is not a de Polignac number, because 49723821 - 2⁶ = 49723757 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49723823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131356 + ... + 131733.

It is an arithmetic number, because the mean of its divisors is an integer number (5261800).

Almost surely, 2^49723821 is an apocalyptic number.

It is an amenable number.

49723821 is a deficient number, since it is larger than the sum of its proper divisors (34464979).

49723821 is a wasteful number, since it uses less digits than its factorization.

49723821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263105 (or 263099 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 49723821 is about 7051.5119655291. The cubic root of 49723821 is about 367.7235957099.

The spelling of 49723821 in words is "forty-nine million, seven hundred twenty-three thousand, eight hundred twenty-one".