10557909 has 6 divisors (see below), whose sum is σ = 15250326. Its totient is φ = 7038600.

The previous prime is 10557893. The next prime is 10557923. The reversal of 10557909 is 90975501.

It is a happy number.

10557909 is a `hidden beast` number, since 10 + 557 + 90 + 9 = 666.

10557909 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 6517809 + 4040100 = 2553^2 + 2010^2 .

It is not a de Polignac number, because 10557909 - 2⁴ = 10557893 is a prime.

It is a super-2 number, since 2×10557909² = 222938884904562, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10557959) 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, 586542 + ... + 586559.

It is an arithmetic number, because the mean of its divisors is an integer number (2541721).

Almost surely, 2^10557909 is an apocalyptic number.

It is an amenable number.

10557909 is a deficient number, since it is larger than the sum of its proper divisors (4692417).

10557909 is a wasteful number, since it uses less digits than its factorization.

10557909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173107 (or 1173104 counting only the distinct ones).

The product of its (nonzero) digits is 14175, while the sum is 36.

The square root of 10557909 is about 3249.2936155417. The cubic root of 10557909 is about 219.3777804211.

The spelling of 10557909 in words is "ten million, five hundred fifty-seven thousand, nine hundred nine".