53723421 has 6 divisors (see below), whose sum is σ = 77600510. Its totient is φ = 35815608.

The previous prime is 53723419. The next prime is 53723429. The reversal of 53723421 is 12432735.

53723421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 47403225 + 6320196 = 6885^2 + 2514^2 .

It is not a de Polignac number, because 53723421 - 2¹ = 53723419 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 (53723429) 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 5 ways as a sum of consecutive naturals, for example, 2984626 + ... + 2984643.

Almost surely, 2^53723421 is an apocalyptic number.

It is an amenable number.

53723421 is a deficient number, since it is larger than the sum of its proper divisors (23877089).

53723421 is a wasteful number, since it uses less digits than its factorization.

53723421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5969275 (or 5969272 counting only the distinct ones).

The product of its digits is 5040, while the sum is 27.

The square root of 53723421 is about 7329.6262524088. The cubic root of 53723421 is about 377.3298995353.

The spelling of 53723421 in words is "fifty-three million, seven hundred twenty-three thousand, four hundred twenty-one".