53783421 has 4 divisors (see below), whose sum is σ = 71711232. Its totient is φ = 35855612.

The previous prime is 53783417. The next prime is 53783441. The reversal of 53783421 is 12438735.

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.

It is a cyclic number.

It is not a de Polignac number, because 53783421 - 2² = 53783417 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53783441) 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, 8963901 + ... + 8963906.

It is an arithmetic number, because the mean of its divisors is an integer number (17927808).

Almost surely, 2^53783421 is an apocalyptic number.

It is an amenable number.

53783421 is a deficient number, since it is larger than the sum of its proper divisors (17927811).

53783421 is a wasteful number, since it uses less digits than its factorization.

53783421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17927810.

The product of its digits is 20160, while the sum is 33.

The square root of 53783421 is about 7333.7180883915. The cubic root of 53783421 is about 377.4703185587.

The spelling of 53783421 in words is "fifty-three million, seven hundred eighty-three thousand, four hundred twenty-one".