1313989 has 4 divisors (see below), whose sum is σ = 1336320. Its totient is φ = 1291660.

The previous prime is 1313987. The next prime is 1313999. The reversal of 1313989 is 9893131.

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 a cyclic number.

It is not a de Polignac number, because 1313989 - 2¹ = 1313987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313987) 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, 11077 + ... + 11194.

It is an arithmetic number, because the mean of its divisors is an integer number (334080).

2^1313989 is an apocalyptic number.

It is an amenable number.

1313989 is a deficient number, since it is larger than the sum of its proper divisors (22331).

1313989 is an equidigital number, since it uses as much as digits as its factorization.

1313989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22330.

The product of its digits is 5832, while the sum is 34.

The square root of 1313989 is about 1146.2935924099. The cubic root of 1313989 is about 109.5293666848.

The spelling of 1313989 in words is "one million, three hundred thirteen thousand, nine hundred eighty-nine".