10165509 has 6 divisors (see below), whose sum is σ = 14683526. Its totient is φ = 6777000.

The previous prime is 10165459. The next prime is 10165531. The reversal of 10165509 is 90556101.

10165509 is a `hidden beast` number, since 1 + 0 + 1 + 655 + 0 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7452900 + 2712609 = 2730^2 + 1647^2 .

It is not a de Polignac number, because 10165509 - 2⁷ = 10165381 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 (10165579) 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 5 ways as a sum of consecutive naturals, for example, 564742 + ... + 564759.

Almost surely, 2^10165509 is an apocalyptic number.

It is an amenable number.

10165509 is a deficient number, since it is larger than the sum of its proper divisors (4518017).

10165509 is a wasteful number, since it uses less digits than its factorization.

10165509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129507 (or 1129504 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 27.

The square root of 10165509 is about 3188.3395364986. The cubic root of 10165509 is about 216.6255656423.

The spelling of 10165509 in words is "ten million, one hundred sixty-five thousand, five hundred nine".