445269989 has 2 divisors, whose sum is σ = 445269990. Its totient is φ = 445269988.

The previous prime is 445269983. The next prime is 445270093. The reversal of 445269989 is 989962544.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 312052225 + 133217764 = 17665^2 + 11542^2 .

It is a cyclic number.

It is not a de Polignac number, because 445269989 - 2¹⁶ = 445204453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445269983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222634994 + 222634995.

It is an arithmetic number, because the mean of its divisors is an integer number (222634995).

Almost surely, 2^445269989 is an apocalyptic number.

It is an amenable number.

445269989 is a deficient number, since it is larger than the sum of its proper divisors (1).

445269989 is an equidigital number, since it uses as much as digits as its factorization.

445269989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5598720, while the sum is 56.

The square root of 445269989 is about 21101.4214924019. The cubic root of 445269989 is about 763.6150424195.

The spelling of 445269989 in words is "four hundred forty-five million, two hundred sixty-nine thousand, nine hundred eighty-nine".