2009558 has 4 divisors (see below), whose sum is σ = 3014340. Its totient is φ = 1004778.

The previous prime is 2009543. The next prime is 2009593. The reversal of 2009558 is 8559002.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2009558.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 502388 + ... + 502391.

It is an arithmetic number, because the mean of its divisors is an integer number (753585).

2^2009558 is an apocalyptic number.

2009558 is a deficient number, since it is larger than the sum of its proper divisors (1004782).

2009558 is a wasteful number, since it uses less digits than its factorization.

2009558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004781.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 2009558 is about 1417.5887979241. The cubic root of 2009558 is about 126.1924915352.

The spelling of 2009558 in words is "two million, nine thousand, five hundred fifty-eight".