9409221709 has 4 divisors (see below), whose sum is σ = 9733677660. Its totient is φ = 9084765760.

The previous prime is 9409221677. The next prime is 9409221713. The reversal of 9409221709 is 9071229049.

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 6487819209 + 2921402500 = 80547^2 + 54050^2 .

It is a cyclic number.

It is not a de Polignac number, because 9409221709 - 2⁵ = 9409221677 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 (9409221719) 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, 162227932 + ... + 162227989.

It is an arithmetic number, because the mean of its divisors is an integer number (2433419415).

Almost surely, 2^9409221709 is an apocalyptic number.

It is an amenable number.

9409221709 is a deficient number, since it is larger than the sum of its proper divisors (324455951).

9409221709 is a wasteful number, since it uses less digits than its factorization.

9409221709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324455950.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 9409221709 is about 97001.1428231647. The cubic root of 9409221709 is about 2111.1442106087.

The spelling of 9409221709 in words is "nine billion, four hundred nine million, two hundred twenty-one thousand, seven hundred nine".