10408509 has 6 divisors (see below), whose sum is σ = 15034526. Its totient is φ = 6939000.

The previous prime is 10408501. The next prime is 10408513. The reversal of 10408509 is 90580401.

It can be written as a sum of positive squares in only one way, i.e., 10381284 + 27225 = 3222^2 + 165^2 .

It is not a de Polignac number, because 10408509 - 2³ = 10408501 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 (10408501) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 578242 + ... + 578259.

Almost surely, 2^10408509 is an apocalyptic number.

It is an amenable number.

10408509 is a deficient number, since it is larger than the sum of its proper divisors (4626017).

10408509 is a wasteful number, since it uses less digits than its factorization.

10408509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156507 (or 1156504 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 10408509 is about 3226.2220940289. Note that the first 3 decimals coincide. The cubic root of 10408509 is about 218.3380902692.

The spelling of 10408509 in words is "ten million, four hundred eight thousand, five hundred nine".