52747439 has 4 divisors (see below), whose sum is σ = 55523640. Its totient is φ = 49971240.

The previous prime is 52747427. The next prime is 52747463. The reversal of 52747439 is 93474725.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52747439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 52747396 and 52747405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52797439) 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, 1388072 + ... + 1388109.

It is an arithmetic number, because the mean of its divisors is an integer number (13880910).

Almost surely, 2^52747439 is an apocalyptic number.

52747439 is a deficient number, since it is larger than the sum of its proper divisors (2776201).

52747439 is a wasteful number, since it uses less digits than its factorization.

52747439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2776200.

The product of its digits is 211680, while the sum is 41.

The square root of 52747439 is about 7262.7432145161. The cubic root of 52747439 is about 375.0309639617.

The spelling of 52747439 in words is "fifty-two million, seven hundred forty-seven thousand, four hundred thirty-nine".