9005557 has 4 divisors (see below), whose sum is σ = 9824256. Its totient is φ = 8186860.

The previous prime is 9005551. The next prime is 9005561. The reversal of 9005557 is 7555009.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 9005557 - 2⁷ = 9005429 is a prime.

It is a super-2 number, since 2×9005557² = 162200113760498, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9005551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 409333 + ... + 409354.

It is an arithmetic number, because the mean of its divisors is an integer number (2456064).

Almost surely, 2^9005557 is an apocalyptic number.

It is an amenable number.

9005557 is a deficient number, since it is larger than the sum of its proper divisors (818699).

9005557 is a wasteful number, since it uses less digits than its factorization.

9005557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818698.

The product of its (nonzero) digits is 7875, while the sum is 31.

The square root of 9005557 is about 3000.9260237467. The cubic root of 9005557 is about 208.0511847037.

The spelling of 9005557 in words is "nine million, five thousand, five hundred fifty-seven".