53566939 has 4 divisors (see below), whose sum is σ = 53586360. Its totient is φ = 53547520.

The previous prime is 53566937. The next prime is 53566979. The reversal of 53566939 is 93966535.

It is a happy number.

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 53566939 - 2¹ = 53566937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53566937) 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, 4717 + ... + 11374.

It is an arithmetic number, because the mean of its divisors is an integer number (13396590).

Almost surely, 2^53566939 is an apocalyptic number.

53566939 is a deficient number, since it is larger than the sum of its proper divisors (19421).

53566939 is a wasteful number, since it uses less digits than its factorization.

53566939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19420.

The product of its digits is 656100, while the sum is 46.

The square root of 53566939 is about 7318.9438445721. The cubic root of 53566939 is about 376.9631894676.

The spelling of 53566939 in words is "fifty-three million, five hundred sixty-six thousand, nine hundred thirty-nine".