447222989 has 2 divisors, whose sum is σ = 447222990. Its totient is φ = 447222988.

The previous prime is 447222947. The next prime is 447223003. The reversal of 447222989 is 989222744.

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., 348120964 + 99102025 = 18658^2 + 9955^2 .

It is a cyclic number.

It is not a de Polignac number, because 447222989 - 2¹⁶ = 447157453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (447222929) 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, 223611494 + 223611495.

It is an arithmetic number, because the mean of its divisors is an integer number (223611495).

Almost surely, 2^447222989 is an apocalyptic number.

It is an amenable number.

447222989 is a deficient number, since it is larger than the sum of its proper divisors (1).

447222989 is an equidigital number, since it uses as much as digits as its factorization.

447222989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 47.

The square root of 447222989 is about 21147.6473632411. The cubic root of 447222989 is about 764.7298455140.

The spelling of 447222989 in words is "four hundred forty-seven million, two hundred twenty-two thousand, nine hundred eighty-nine".