52639861 has 8 divisors (see below), whose sum is σ = 55836000. Its totient is φ = 49486320.

The previous prime is 52639831. The next prime is 52639877. The reversal of 52639861 is 16893625.

52639861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 52639861 - 2⁷ = 52639733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52639831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8086 + ... + 13063.

It is an arithmetic number, because the mean of its divisors is an integer number (6979500).

Almost surely, 2^52639861 is an apocalyptic number.

It is an amenable number.

52639861 is a deficient number, since it is larger than the sum of its proper divisors (3196139).

52639861 is a wasteful number, since it uses less digits than its factorization.

52639861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21299.

The product of its digits is 77760, while the sum is 40.

The square root of 52639861 is about 7255.3332797329. Note that the first 3 decimals coincide. The cubic root of 52639861 is about 374.7758328391.

The spelling of 52639861 in words is "fifty-two million, six hundred thirty-nine thousand, eight hundred sixty-one".