52785869 has 2 divisors, whose sum is σ = 52785870. Its totient is φ = 52785868.

The previous prime is 52785823. The next prime is 52785871. The reversal of 52785869 is 96858725.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39375625 + 13410244 = 6275^2 + 3662^2 .

It is a cyclic number.

It is not a de Polignac number, because 52785869 - 2⁸ = 52785613 is a prime.

It is a super-2 number, since 2×52785869² = 5572695932170322, which contains 22 as substring.

Together with 52785871, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52785269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26392934 + 26392935.

It is an arithmetic number, because the mean of its divisors is an integer number (26392935).

Almost surely, 2^52785869 is an apocalyptic number.

It is an amenable number.

52785869 is a deficient number, since it is larger than the sum of its proper divisors (1).

52785869 is an equidigital number, since it uses as much as digits as its factorization.

52785869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1209600, while the sum is 50.

The square root of 52785869 is about 7265.3884273313. The cubic root of 52785869 is about 375.1220201438.

The spelling of 52785869 in words is "fifty-two million, seven hundred eighty-five thousand, eight hundred sixty-nine".