53983639 has 4 divisors (see below), whose sum is σ = 54507856. Its totient is φ = 53459424.

The previous prime is 53983607. The next prime is 53983649. The reversal of 53983639 is 93638935.

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 53983639 - 2⁵ = 53983607 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 (53983649) 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, 261954 + ... + 262159.

It is an arithmetic number, because the mean of its divisors is an integer number (13626964).

Almost surely, 2^53983639 is an apocalyptic number.

53983639 is a deficient number, since it is larger than the sum of its proper divisors (524217).

53983639 is a wasteful number, since it uses less digits than its factorization.

53983639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524216.

The product of its digits is 524880, while the sum is 46.

The square root of 53983639 is about 7347.3559189684. The cubic root of 53983639 is about 377.9381378379.

The spelling of 53983639 in words is "fifty-three million, nine hundred eighty-three thousand, six hundred thirty-nine".