1009409 has 4 divisors (see below), whose sum is σ = 1068804. Its totient is φ = 950016.

The previous prime is 1009399. The next prime is 1009417. The reversal of 1009409 is 9049001.

1009409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9049001 = 13 ⋅696077.

It can be written as a sum of positive squares in 2 ways, for example, as 861184 + 148225 = 928^2 + 385^2 .

It is a cyclic number.

It is not a de Polignac number, because 1009409 - 2⁸ = 1009153 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 (1009439) 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, 29672 + ... + 29705.

It is an arithmetic number, because the mean of its divisors is an integer number (267201).

2^1009409 is an apocalyptic number.

It is an amenable number.

1009409 is a deficient number, since it is larger than the sum of its proper divisors (59395).

1009409 is an equidigital number, since it uses as much as digits as its factorization.

1009409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59394.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 1009409 is about 1004.6934855965. The cubic root of 1009409 is about 100.3126547844.

It can be divided in two parts, 100 and 9409, that multiplied together give a square (940900 = 970²).

The spelling of 1009409 in words is "one million, nine thousand, four hundred nine".