445997983 has 2 divisors, whose sum is σ = 445997984. Its totient is φ = 445997982.

The previous prime is 445997969. The next prime is 445997999. The reversal of 445997983 is 389799544.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445997983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445997483) 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, 222998991 + 222998992.

It is an arithmetic number, because the mean of its divisors is an integer number (222998992).

Almost surely, 2^445997983 is an apocalyptic number.

445997983 is a deficient number, since it is larger than the sum of its proper divisors (1).

445997983 is an equidigital number, since it uses as much as digits as its factorization.

445997983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9797760, while the sum is 58.

The square root of 445997983 is about 21118.6643280298. The cubic root of 445997983 is about 764.0309732013.

The spelling of 445997983 in words is "four hundred forty-five million, nine hundred ninety-seven thousand, nine hundred eighty-three".