53744639 has 4 divisors (see below), whose sum is σ = 57878856. Its totient is φ = 49610424.

The previous prime is 53744623. The next prime is 53744659. The reversal of 53744639 is 93644735.

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 53744639 - 2⁴ = 53744623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 53744596 and 53744605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53744659) 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, 2067089 + ... + 2067114.

It is an arithmetic number, because the mean of its divisors is an integer number (14469714).

Almost surely, 2^53744639 is an apocalyptic number.

53744639 is a deficient number, since it is larger than the sum of its proper divisors (4134217).

53744639 is a wasteful number, since it uses less digits than its factorization.

53744639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4134216.

The product of its digits is 272160, while the sum is 41.

The square root of 53744639 is about 7331.0735230251. The cubic root of 53744639 is about 377.3795683258.

The spelling of 53744639 in words is "fifty-three million, seven hundred forty-four thousand, six hundred thirty-nine".