1349989 has 4 divisors (see below), whose sum is σ = 1368556. Its totient is φ = 1331424.

The previous prime is 1349977. The next prime is 1349993. The reversal of 1349989 is 9899431.

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 656100 + 693889 = 810^2 + 833^2 .

It is a cyclic number.

It is not a de Polignac number, because 1349989 - 2¹⁹ = 825701 is a prime.

It is a Duffinian number.

1349989 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1349189) 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, 9174 + ... + 9319.

It is an arithmetic number, because the mean of its divisors is an integer number (342139).

2^1349989 is an apocalyptic number.

It is an amenable number.

1349989 is a deficient number, since it is larger than the sum of its proper divisors (18567).

1349989 is an equidigital number, since it uses as much as digits as its factorization.

1349989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18566.

The product of its digits is 69984, while the sum is 43.

The square root of 1349989 is about 1161.8902702063. The cubic root of 1349989 is about 110.5206447781.

It can be divided in two parts, 1349 and 989, that multiplied together give a triangular number (1334161 = T₁₆₃₃).

The spelling of 1349989 in words is "one million, three hundred forty-nine thousand, nine hundred eighty-nine".