52697993 has 4 divisors (see below), whose sum is σ = 53209728. Its totient is φ = 52186260.

The previous prime is 52697989. The next prime is 52698013. The reversal of 52697993 is 39979625.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 52697993 - 2² = 52697989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (52697933) 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, 255713 + ... + 255918.

It is an arithmetic number, because the mean of its divisors is an integer number (13302432).

Almost surely, 2^52697993 is an apocalyptic number.

It is an amenable number.

52697993 is a deficient number, since it is larger than the sum of its proper divisors (511735).

52697993 is a wasteful number, since it uses less digits than its factorization.

52697993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511734.

The product of its digits is 918540, while the sum is 50.

The square root of 52697993 is about 7259.3383307296. The cubic root of 52697993 is about 374.9137413452.

The spelling of 52697993 in words is "fifty-two million, six hundred ninety-seven thousand, nine hundred ninety-three".