445540873 has 2 divisors, whose sum is σ = 445540874. Its totient is φ = 445540872.

The previous prime is 445540867. The next prime is 445540933. The reversal of 445540873 is 378045544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 426505104 + 19035769 = 20652^2 + 4363^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445540873 is a prime.

It is a super-3 number, since 3×445540873³ (a number of 27 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (445547873) 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, 222770436 + 222770437.

It is an arithmetic number, because the mean of its divisors is an integer number (222770437).

Almost surely, 2^445540873 is an apocalyptic number.

It is an amenable number.

445540873 is a deficient number, since it is larger than the sum of its proper divisors (1).

445540873 is an equidigital number, since it uses as much as digits as its factorization.

445540873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 268800, while the sum is 40.

The square root of 445540873 is about 21107.8391362072. The cubic root of 445540873 is about 763.7698617200.

The spelling of 445540873 in words is "four hundred forty-five million, five hundred forty thousand, eight hundred seventy-three".