445740389 has 2 divisors, whose sum is σ = 445740390. Its totient is φ = 445740388.

The previous prime is 445740377. The next prime is 445740403. The reversal of 445740389 is 983047544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 443313025 + 2427364 = 21055^2 + 1558^2 .

It is a cyclic number.

It is not a de Polignac number, because 445740389 - 2²⁰ = 444691813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445740319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222870194 + 222870195.

It is an arithmetic number, because the mean of its divisors is an integer number (222870195).

Almost surely, 2^445740389 is an apocalyptic number.

It is an amenable number.

445740389 is a deficient number, since it is larger than the sum of its proper divisors (1).

445740389 is an equidigital number, since it uses as much as digits as its factorization.

445740389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 44.

The square root of 445740389 is about 21112.5647186693. The cubic root of 445740389 is about 763.8838516862.

The spelling of 445740389 in words is "four hundred forty-five million, seven hundred forty thousand, three hundred eighty-nine".