10493821 has 4 divisors (see below), whose sum is σ = 11301052. Its totient is φ = 9686592.

The previous prime is 10493801. The next prime is 10493851. The reversal of 10493821 is 12839401.

It is a happy number.

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 2592100 + 7901721 = 1610^2 + 2811^2 .

It is a cyclic number.

It is not a de Polignac number, because 10493821 - 2⁹ = 10493309 is a prime.

It is a super-2 number, since 2×10493821² = 220240558360082, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 10493821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10493801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 403596 + ... + 403621.

It is an arithmetic number, because the mean of its divisors is an integer number (2825263).

Almost surely, 2^10493821 is an apocalyptic number.

It is an amenable number.

10493821 is a deficient number, since it is larger than the sum of its proper divisors (807231).

10493821 is an equidigital number, since it uses as much as digits as its factorization.

10493821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807230.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 10493821 is about 3239.4167684940. The cubic root of 10493821 is about 218.9329945202.

The spelling of 10493821 in words is "ten million, four hundred ninety-three thousand, eight hundred twenty-one".