9440421509 has 4 divisors (see below), whose sum is σ = 9444470316. Its totient is φ = 9436372704.

The previous prime is 9440421481. The next prime is 9440421583. The reversal of 9440421509 is 9051240449.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3352989025 + 6087432484 = 57905^2 + 78022^2 .

It is a cyclic number.

It is not a de Polignac number, because 9440421509 - 2¹⁶ = 9440355973 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9440421409) 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, 2020904 + ... + 2025569.

It is an arithmetic number, because the mean of its divisors is an integer number (2361117579).

Almost surely, 2^9440421509 is an apocalyptic number.

It is an amenable number.

9440421509 is a deficient number, since it is larger than the sum of its proper divisors (4048807).

9440421509 is a wasteful number, since it uses less digits than its factorization.

9440421509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4048806.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 9440421509 is about 97161.8315440791. The cubic root of 9440421509 is about 2113.4750661052.

The spelling of 9440421509 in words is "nine billion, four hundred forty million, four hundred twenty-one thousand, five hundred nine".