52708139 has 4 divisors (see below), whose sum is σ = 57499800. Its totient is φ = 47916480.

The previous prime is 52708133. The next prime is 52708141. The reversal of 52708139 is 93180725.

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-52708139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 52708099 and 52708108.

It is not an unprimeable number, because it can be changed into a prime (52708133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2395814 + ... + 2395835.

It is an arithmetic number, because the mean of its divisors is an integer number (14374950).

Almost surely, 2^52708139 is an apocalyptic number.

52708139 is a deficient number, since it is larger than the sum of its proper divisors (4791661).

52708139 is a wasteful number, since it uses less digits than its factorization.

52708139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4791660.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 52708139 is about 7260.0371211172. The cubic root of 52708139 is about 374.9378006468.

The spelling of 52708139 in words is "fifty-two million, seven hundred eight thousand, one hundred thirty-nine".