445649 has 2 divisors, whose sum is σ = 445650. Its totient is φ = 445648.

The previous prime is 445633. The next prime is 445657. The reversal of 445649 is 946544.

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., 399424 + 46225 = 632^2 + 215^2 .

It is a cyclic number.

It is not a de Polignac number, because 445649 - 2⁴ = 445633 is a prime.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 445649.

It is not a weakly prime, because it can be changed into another prime (445619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222824 + 222825.

It is an arithmetic number, because the mean of its divisors is an integer number (222825).

2⁴⁴⁵⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

445649 is a deficient number, since it is larger than the sum of its proper divisors (1).

445649 is an equidigital number, since it uses as much as digits as its factorization.

445649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 32.

The square root of 445649 is about 667.5694720402. The cubic root of 445649 is about 76.3831642407.

The spelling of 445649 in words is "four hundred forty-five thousand, six hundred forty-nine".