445660973 has 2 divisors, whose sum is σ = 445660974. Its totient is φ = 445660972.

The previous prime is 445660961. The next prime is 445661023. The reversal of 445660973 is 379066544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 441924484 + 3736489 = 21022^2 + 1933^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445660973 is a prime.

It is a super-2 number, since 2×445660973² = 397227405710613458, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445668973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222830486 + 222830487.

It is an arithmetic number, because the mean of its divisors is an integer number (222830487).

Almost surely, 2^445660973 is an apocalyptic number.

It is an amenable number.

445660973 is a deficient number, since it is larger than the sum of its proper divisors (1).

445660973 is an equidigital number, since it uses as much as digits as its factorization.

445660973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 44.

The square root of 445660973 is about 21110.6838591269. The cubic root of 445660973 is about 763.8384828238.

The spelling of 445660973 in words is "four hundred forty-five million, six hundred sixty thousand, nine hundred seventy-three".