52821493 has 2 divisors, whose sum is σ = 52821494. Its totient is φ = 52821492.

The previous prime is 52821491. The next prime is 52821521. The reversal of 52821493 is 39412825.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49660209 + 3161284 = 7047^2 + 1778^2 .

It is a cyclic number.

It is not a de Polignac number, because 52821493 - 2¹ = 52821491 is a prime.

It is a super-3 number, since 3×52821493³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 52821491, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52821491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26410746 + 26410747.

It is an arithmetic number, because the mean of its divisors is an integer number (26410747).

Almost surely, 2^52821493 is an apocalyptic number.

It is an amenable number.

52821493 is a deficient number, since it is larger than the sum of its proper divisors (1).

52821493 is an equidigital number, since it uses as much as digits as its factorization.

52821493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 34.

The square root of 52821493 is about 7267.8396377466. The cubic root of 52821493 is about 375.2063883154.

The spelling of 52821493 in words is "fifty-two million, eight hundred twenty-one thousand, four hundred ninety-three".