1443772009 has 3 divisors (see below), whose sum is σ = 1443810007. Its totient is φ = 1443734012.

The previous prime is 1443771919. The next prime is 1443772061. The reversal of 1443772009 is 9002773441.

The square root of 1443772009 is 37997.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1389425625 + 54346384 = 37275^2 + 7372^2 .

It is not a de Polignac number, because 1443772009 - 2¹³ = 1443763817 is a prime.

It is a super-2 number, since 2×1443772009² = 4168955227943792162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1443772069) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 18999 + ... + 56995.

Almost surely, 2^1443772009 is an apocalyptic number.

1443772009 is the 37997-th square number.

1443772009 is the 18999-th centered octagonal number.

It is an amenable number.

1443772009 is a deficient number, since it is larger than the sum of its proper divisors (37998).

1443772009 is an frugal number, since it uses more digits than its factorization.

1443772009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75994 (or 37997 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 37.

The cubic root of 1443772009 is about 1130.2283739744.

The spelling of 1443772009 in words is "one billion, four hundred forty-three million, seven hundred seventy-two thousand, nine".