1445909573 has 4 divisors (see below), whose sum is σ = 1446701088. Its totient is φ = 1445118060.

The previous prime is 1445909561. The next prime is 1445909581. The reversal of 1445909573 is 3759095441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3759095441 = 36643 ⋅102587.

It is a cyclic number.

It is not a de Polignac number, because 1445909573 - 2¹² = 1445905477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1445902573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 393011 + ... + 396672.

It is an arithmetic number, because the mean of its divisors is an integer number (361675272).

Almost surely, 2^1445909573 is an apocalyptic number.

It is an amenable number.

1445909573 is a deficient number, since it is larger than the sum of its proper divisors (791515).

1445909573 is an equidigital number, since it uses as much as digits as its factorization.

1445909573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791514.

The product of its (nonzero) digits is 680400, while the sum is 47.

The square root of 1445909573 is about 38025.1176592525. The cubic root of 1445909573 is about 1130.7858821662.

The spelling of 1445909573 in words is "one billion, four hundred forty-five million, nine hundred nine thousand, five hundred seventy-three".