1880009 has 4 divisors (see below), whose sum is σ = 1906560. Its totient is φ = 1853460.

The previous prime is 1879967. The next prime is 1880017. The reversal of 1880009 is 9000881.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9000881 = 31 ⋅290351.

It is a cyclic number.

It is not a de Polignac number, because 1880009 - 2¹⁶ = 1814473 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1880009.

It is not an unprimeable number, because it can be changed into a prime (1880209) 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, 13169 + ... + 13310.

It is an arithmetic number, because the mean of its divisors is an integer number (476640).

2^1880009 is an apocalyptic number.

It is an amenable number.

1880009 is a deficient number, since it is larger than the sum of its proper divisors (26551).

1880009 is an equidigital number, since it uses as much as digits as its factorization.

1880009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26550.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 1880009 is about 1371.1342020386. The cubic root of 1880009 is about 123.4203128022.

The spelling of 1880009 in words is "one million, eight hundred eighty thousand, nine".