52668569 has 4 divisors (see below), whose sum is σ = 52747044. Its totient is φ = 52590096.

The previous prime is 52668557. The next prime is 52668587. The reversal of 52668569 is 96586625.

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

It can be written as a sum of positive squares in 2 ways, for example, as 48720400 + 3948169 = 6980^2 + 1987^2 .

It is a cyclic number.

It is not a de Polignac number, because 52668569 - 2¹² = 52664473 is a prime.

It is a super-2 number, since 2×52668569² = 5547956321015522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (52668169) 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, 38222 + ... + 39575.

It is an arithmetic number, because the mean of its divisors is an integer number (13186761).

Almost surely, 2^52668569 is an apocalyptic number.

It is an amenable number.

52668569 is a deficient number, since it is larger than the sum of its proper divisors (78475).

52668569 is an equidigital number, since it uses as much as digits as its factorization.

52668569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78474.

The product of its digits is 777600, while the sum is 47.

The square root of 52668569 is about 7257.3114167714. The cubic root of 52668569 is about 374.8439504792.

The spelling of 52668569 in words is "fifty-two million, six hundred sixty-eight thousand, five hundred sixty-nine".