53838665 has 4 divisors (see below), whose sum is σ = 64606404. Its totient is φ = 43070928.

The previous prime is 53838649. The next prime is 53838683. The reversal of 53838665 is 56683835.

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

It can be written as a sum of positive squares in 2 ways, for example, as 23775376 + 30063289 = 4876^2 + 5483^2 .

It is a cyclic number.

It is not a de Polignac number, because 53838665 - 2⁴ = 53838649 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5383862 + ... + 5383871.

It is an arithmetic number, because the mean of its divisors is an integer number (16151601).

Almost surely, 2^53838665 is an apocalyptic number.

It is an amenable number.

53838665 is a deficient number, since it is larger than the sum of its proper divisors (10767739).

53838665 is a wasteful number, since it uses less digits than its factorization.

53838665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10767738.

The product of its digits is 518400, while the sum is 44.

The square root of 53838665 is about 7337.4835604586. The cubic root of 53838665 is about 377.5995147199.

The spelling of 53838665 in words is "fifty-three million, eight hundred thirty-eight thousand, six hundred sixty-five".