9785409 has 4 divisors (see below), whose sum is σ = 13047216. Its totient is φ = 6523604.

The previous prime is 9785389. The next prime is 9785411. The reversal of 9785409 is 9045879.

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: 9045879 = 3 ⋅3015293.

It is a cyclic number.

It is not a de Polignac number, because 9785409 - 2¹² = 9781313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9785449) 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, 1630899 + ... + 1630904.

It is an arithmetic number, because the mean of its divisors is an integer number (3261804).

Almost surely, 2^9785409 is an apocalyptic number.

It is an amenable number.

9785409 is a deficient number, since it is larger than the sum of its proper divisors (3261807).

9785409 is a wasteful number, since it uses less digits than its factorization.

9785409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3261806.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 9785409 is about 3128.1638384202. The cubic root of 9785409 is about 213.8912380045.

The spelling of 9785409 in words is "nine million, seven hundred eighty-five thousand, four hundred nine".