693060021 has 6 divisors (see below), whose sum is σ = 1001086710. Its totient is φ = 462040008.

The previous prime is 693060001. The next prime is 693060037. The reversal of 693060021 is 120060396.

It is a happy number.

693060021 is a `hidden beast` number, since 6 + 9 + 30 + 600 + 21 = 666.

693060021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 370139121 + 322920900 = 19239^2 + 17970^2 .

It is not a de Polignac number, because 693060021 - 2¹⁰ = 693058997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (693060001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38503326 + ... + 38503343.

It is an arithmetic number, because the mean of its divisors is an integer number (166847785).

Almost surely, 2^693060021 is an apocalyptic number.

It is an amenable number.

693060021 is a deficient number, since it is larger than the sum of its proper divisors (308026689).

693060021 is a wasteful number, since it uses less digits than its factorization.

693060021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77006675 (or 77006672 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 693060021 is about 26326.0331421200. The cubic root of 693060021 is about 884.9599483933.

The spelling of 693060021 in words is "six hundred ninety-three million, sixty thousand, twenty-one".