53991727 has 4 divisors (see below), whose sum is σ = 54155176. Its totient is φ = 53828280.

The previous prime is 53991719. The next prime is 53991809. The reversal of 53991727 is 72719935.

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

It is a cyclic number.

It is not a de Polignac number, because 53991727 - 2³ = 53991719 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 (53991827) 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 3 ways as a sum of consecutive naturals, for example, 81228 + ... + 81889.

It is an arithmetic number, because the mean of its divisors is an integer number (13538794).

Almost surely, 2^53991727 is an apocalyptic number.

53991727 is a deficient number, since it is larger than the sum of its proper divisors (163449).

53991727 is a wasteful number, since it uses less digits than its factorization.

53991727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163448.

The product of its digits is 119070, while the sum is 43.

The square root of 53991727 is about 7347.9063004369. The cubic root of 53991727 is about 377.9570115255.

The spelling of 53991727 in words is "fifty-three million, nine hundred ninety-one thousand, seven hundred twenty-seven".