53855639 has 4 divisors (see below), whose sum is σ = 55712760. Its totient is φ = 51998520.

The previous prime is 53855623. The next prime is 53855647. The reversal of 53855639 is 93655835.

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 53855639 - 2⁴ = 53855623 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53855639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53854639) 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, 928517 + ... + 928574.

It is an arithmetic number, because the mean of its divisors is an integer number (13928190).

Almost surely, 2^53855639 is an apocalyptic number.

53855639 is a deficient number, since it is larger than the sum of its proper divisors (1857121).

53855639 is a wasteful number, since it uses less digits than its factorization.

53855639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1857120.

The product of its digits is 486000, while the sum is 44.

The square root of 53855639 is about 7338.6401328857. The cubic root of 53855639 is about 377.6391931475.

The spelling of 53855639 in words is "fifty-three million, eight hundred fifty-five thousand, six hundred thirty-nine".