1308889 has 4 divisors (see below), whose sum is σ = 1312420. Its totient is φ = 1305360.

The previous prime is 1308887. The next prime is 1308899. The reversal of 1308889 is 9888031.

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

It can be written as a sum of positive squares in 2 ways, for example, as 81225 + 1227664 = 285^2 + 1108^2 .

It is a cyclic number.

It is not a de Polignac number, because 1308889 - 2¹ = 1308887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1308883) 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, 1134 + ... + 1975.

It is an arithmetic number, because the mean of its divisors is an integer number (328105).

2^1308889 is an apocalyptic number.

It is an amenable number.

1308889 is a deficient number, since it is larger than the sum of its proper divisors (3531).

1308889 is an equidigital number, since it uses as much as digits as its factorization.

1308889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3530.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 1308889 is about 1144.0668686751. The cubic root of 1308889 is about 109.3874771072.

It can be divided in two parts, 1308 and 889, that added together give a cube (2197 = 13³).

The spelling of 1308889 in words is "one million, three hundred eight thousand, eight hundred eighty-nine".