1310889 has 4 divisors (see below), whose sum is σ = 1747856. Its totient is φ = 873924.

The previous prime is 1310851. The next prime is 1310891. The reversal of 1310889 is 9880131.

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 1310889 - 2⁸ = 1310633 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1310809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218479 + ... + 218484.

It is an arithmetic number, because the mean of its divisors is an integer number (436964).

2^1310889 is an apocalyptic number.

It is an amenable number.

1310889 is a deficient number, since it is larger than the sum of its proper divisors (436967).

1310889 is an equidigital number, since it uses as much as digits as its factorization.

1310889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436966.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 1310889 is about 1144.9406098135. The cubic root of 1310889 is about 109.4431639323.

The spelling of 1310889 in words is "one million, three hundred ten thousand, eight hundred eighty-nine".