445223477 has 2 divisors, whose sum is σ = 445223478. Its totient is φ = 445223476.

The previous prime is 445223393. The next prime is 445223491. The reversal of 445223477 is 774322544.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 340550116 + 104673361 = 18454^2 + 10231^2 .

It is a cyclic number.

It is not a de Polignac number, because 445223477 - 2⁸ = 445223221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 445223477.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445223497) 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, 222611738 + 222611739.

It is an arithmetic number, because the mean of its divisors is an integer number (222611739).

Almost surely, 2^445223477 is an apocalyptic number.

It is an amenable number.

445223477 is a deficient number, since it is larger than the sum of its proper divisors (1).

445223477 is an equidigital number, since it uses as much as digits as its factorization.

445223477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 188160, while the sum is 38.

The square root of 445223477 is about 21100.3193577728. The cubic root of 445223477 is about 763.5884529341.

The spelling of 445223477 in words is "four hundred forty-five million, two hundred twenty-three thousand, four hundred seventy-seven".