445561903 has 2 divisors, whose sum is σ = 445561904. Its totient is φ = 445561902.

The previous prime is 445561871. The next prime is 445561931. The reversal of 445561903 is 309165544.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 445561903 - 2⁵ = 445561871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445561933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222780951 + 222780952.

It is an arithmetic number, because the mean of its divisors is an integer number (222780952).

Almost surely, 2^445561903 is an apocalyptic number.

445561903 is a deficient number, since it is larger than the sum of its proper divisors (1).

445561903 is an equidigital number, since it uses as much as digits as its factorization.

445561903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 445561903 is about 21108.3372864847. The cubic root of 445561903 is about 763.7818784458.

The spelling of 445561903 in words is "four hundred forty-five million, five hundred sixty-one thousand, nine hundred three".