445969 has 2 divisors, whose sum is σ = 445970. Its totient is φ = 445968.

The previous prime is 445967. The next prime is 446003. The reversal of 445969 is 969544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 439569 + 6400 = 663^2 + 80^2 .

It is a cyclic number.

It is not a de Polignac number, because 445969 - 2¹ = 445967 is a prime.

It is a super-2 number, since 2×445969² = 397776697922, which contains 22 as substring.

Together with 445967, it forms a pair of twin primes.

445969 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (445967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222984 + 222985.

It is an arithmetic number, because the mean of its divisors is an integer number (222985).

2⁴⁴⁵⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

445969 is a deficient number, since it is larger than the sum of its proper divisors (1).

445969 is an equidigital number, since it uses as much as digits as its factorization.

445969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 37.

The square root of 445969 is about 667.8091044602. The cubic root of 445969 is about 76.4014422761.

The spelling of 445969 in words is "four hundred forty-five thousand, nine hundred sixty-nine".