10021969 has 2 divisors, whose sum is σ = 10021970. Its totient is φ = 10021968.

The previous prime is 10021933. The next prime is 10022009. The reversal of 10021969 is 96912001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9381969 + 640000 = 3063^2 + 800^2 .

It is an emirp because it is prime and its reverse (96912001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10021969 - 2⁹ = 10021457 is a prime.

It is a super-2 number, since 2×10021969² = 200879725273922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (10021909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010984 + 5010985.

It is an arithmetic number, because the mean of its divisors is an integer number (5010985).

Almost surely, 2^10021969 is an apocalyptic number.

It is an amenable number.

10021969 is a deficient number, since it is larger than the sum of its proper divisors (1).

10021969 is an equidigital number, since it uses as much as digits as its factorization.

10021969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 10021969 is about 3165.7493583668. The cubic root of 10021969 is about 215.6011228619.

The spelling of 10021969 in words is "ten million, twenty-one thousand, nine hundred sixty-nine".