440966021 has 2 divisors, whose sum is σ = 440966022. Its totient is φ = 440966020.

The previous prime is 440965999. The next prime is 440966033. The reversal of 440966021 is 120669044.

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., 338044996 + 102921025 = 18386^2 + 10145^2 .

It is a cyclic number.

It is not a de Polignac number, because 440966021 - 2⁶ = 440965957 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440966821) 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 as a sum of consecutive naturals, namely, 220483010 + 220483011.

It is an arithmetic number, because the mean of its divisors is an integer number (220483011).

Almost surely, 2^440966021 is an apocalyptic number.

It is an amenable number.

440966021 is a deficient number, since it is larger than the sum of its proper divisors (1).

440966021 is an equidigital number, since it uses as much as digits as its factorization.

440966021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 440966021 is about 20999.1909606061. The cubic root of 440966021 is about 761.1467113419.

The spelling of 440966021 in words is "four hundred forty million, nine hundred sixty-six thousand, twenty-one".