10169821 has 2 divisors, whose sum is σ = 10169822. Its totient is φ = 10169820.

The previous prime is 10169773. The next prime is 10169837. The reversal of 10169821 is 12896101.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10169721 + 100 = 3189^2 + 10^2 .

It is a cyclic number.

It is not a de Polignac number, because 10169821 - 2⁹ = 10169309 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10169821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10169881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5084910 + 5084911.

It is an arithmetic number, because the mean of its divisors is an integer number (5084911).

Almost surely, 2^10169821 is an apocalyptic number.

It is an amenable number.

10169821 is a deficient number, since it is larger than the sum of its proper divisors (1).

10169821 is an equidigital number, since it uses as much as digits as its factorization.

10169821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 10169821 is about 3189.0156788577. The cubic root of 10169821 is about 216.6561906835.

The spelling of 10169821 in words is "ten million, one hundred sixty-nine thousand, eight hundred twenty-one".