7009409 has 12 divisors (see below), whose sum is σ = 7857108. Its totient is φ = 6246240.

The previous prime is 7009399. The next prime is 7009421. The reversal of 7009409 is 9049007.

It can be written as a sum of positive squares in 2 ways, for example, as 6235009 + 774400 = 2497^2 + 880^2 .

It is not a de Polignac number, because 7009409 - 2⁴ = 7009393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7009469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5867 + ... + 6959.

It is an arithmetic number, because the mean of its divisors is an integer number (654759).

Almost surely, 2^7009409 is an apocalyptic number.

It is an amenable number.

7009409 is a deficient number, since it is larger than the sum of its proper divisors (847699).

7009409 is a wasteful number, since it uses less digits than its factorization.

7009409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1168 (or 1157 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 7009409 is about 2647.5288478126. The cubic root of 7009409 is about 191.3787883306.

The spelling of 7009409 in words is "seven million, nine thousand, four hundred nine".