445644377 has 2 divisors, whose sum is σ = 445644378. Its totient is φ = 445644376.

The previous prime is 445644349. The next prime is 445644379. The reversal of 445644377 is 773446544.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 429152656 + 16491721 = 20716^2 + 4061^2 .

It is a cyclic number.

It is not a de Polignac number, because 445644377 - 2¹⁴ = 445627993 is a prime.

Together with 445644379, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (445644379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222822188 + 222822189.

It is an arithmetic number, because the mean of its divisors is an integer number (222822189).

Almost surely, 2^445644377 is an apocalyptic number.

It is an amenable number.

445644377 is a deficient number, since it is larger than the sum of its proper divisors (1).

445644377 is an equidigital number, since it uses as much as digits as its factorization.

445644377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1128960, while the sum is 44.

The square root of 445644377 is about 21110.2907843544. The cubic root of 445644377 is about 763.8290011613.

The spelling of 445644377 in words is "four hundred forty-five million, six hundred forty-four thousand, three hundred seventy-seven".