445657 has 2 divisors, whose sum is σ = 445658. Its totient is φ = 445656.

The previous prime is 445649. The next prime is 445691. The reversal of 445657 is 756544.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 440896 + 4761 = 664^2 + 69^2 .

It is a cyclic number.

It is not a de Polignac number, because 445657 - 2³ = 445649 is a prime.

It is a super-2 number, since 2×445657² = 397220323298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (445157) 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, 222828 + 222829.

It is an arithmetic number, because the mean of its divisors is an integer number (222829).

2⁴⁴⁵⁶⁵⁷ is an apocalyptic number.

It is an amenable number.

445657 is a deficient number, since it is larger than the sum of its proper divisors (1).

445657 is an equidigital number, since it uses as much as digits as its factorization.

445657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16800, while the sum is 31.

The square root of 445657 is about 667.5754638990. The cubic root of 445657 is about 76.3836212982.

The spelling of 445657 in words is "four hundred forty-five thousand, six hundred fifty-seven".