53821723 has 4 divisors (see below), whose sum is σ = 54344368. Its totient is φ = 53299080.

The previous prime is 53821697. The next prime is 53821727. The reversal of 53821723 is 32712835.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53821723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53821727) 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, 261168 + ... + 261373.

It is an arithmetic number, because the mean of its divisors is an integer number (13586092).

Almost surely, 2^53821723 is an apocalyptic number.

53821723 is a deficient number, since it is larger than the sum of its proper divisors (522645).

53821723 is a wasteful number, since it uses less digits than its factorization.

53821723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522644.

The product of its digits is 10080, while the sum is 31.

The square root of 53821723 is about 7336.3289866254. The cubic root of 53821723 is about 377.5599027785.

The spelling of 53821723 in words is "fifty-three million, eight hundred twenty-one thousand, seven hundred twenty-three".