52821693 has 8 divisors (see below), whose sum is σ = 78254400. Its totient is φ = 35214444.

The previous prime is 52821683. The next prime is 52821719. The reversal of 52821693 is 39612825.

It is not a de Polignac number, because 52821693 - 2⁴ = 52821677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52821683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 978153 + ... + 978206.

It is an arithmetic number, because the mean of its divisors is an integer number (9781800).

Almost surely, 2^52821693 is an apocalyptic number.

It is an amenable number.

52821693 is a deficient number, since it is larger than the sum of its proper divisors (25432707).

52821693 is a wasteful number, since it uses less digits than its factorization.

52821693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1956368 (or 1956362 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 52821693 is about 7267.8533969804. The cubic root of 52821693 is about 375.2068618675.

The spelling of 52821693 in words is "fifty-two million, eight hundred twenty-one thousand, six hundred ninety-three".