445433921 has 2 divisors, whose sum is σ = 445433922. Its totient is φ = 445433920.

The previous prime is 445433873. The next prime is 445433953. The reversal of 445433921 is 129334544.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 299290000 + 146143921 = 17300^2 + 12089^2 .

It is a cyclic number.

It is not a de Polignac number, because 445433921 - 2¹⁴ = 445417537 is a prime.

It is a super-2 number, since 2×445433921² = 396822755954868482, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (445433971) 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, 222716960 + 222716961.

It is an arithmetic number, because the mean of its divisors is an integer number (222716961).

Almost surely, 2^445433921 is an apocalyptic number.

It is an amenable number.

445433921 is a deficient number, since it is larger than the sum of its proper divisors (1).

445433921 is an equidigital number, since it uses as much as digits as its factorization.

445433921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 35.

The square root of 445433921 is about 21105.3055178076. The cubic root of 445433921 is about 763.7087425602.

The spelling of 445433921 in words is "four hundred forty-five million, four hundred thirty-three thousand, nine hundred twenty-one".