9040509 has 6 divisors (see below), whose sum is σ = 13058526. Its totient is φ = 6027000.

The previous prime is 9040487. The next prime is 9040517. The reversal of 9040509 is 9050409.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 9018009 + 22500 = 3003^2 + 150^2 .

It is not a de Polignac number, because 9040509 - 2⁵ = 9040477 is a prime.

9040509 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9040529) 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, 502242 + ... + 502259.

It is an arithmetic number, because the mean of its divisors is an integer number (2176421).

Almost surely, 2^9040509 is an apocalyptic number.

It is an amenable number.

9040509 is a deficient number, since it is larger than the sum of its proper divisors (4018017).

9040509 is a wasteful number, since it uses less digits than its factorization.

9040509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004507 (or 1004504 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 9040509 is about 3006.7439199240. The cubic root of 9040509 is about 208.3199971552.

The spelling of 9040509 in words is "nine million, forty thousand, five hundred nine".