1369989 has 18 divisors (see below), whose sum is σ = 2060786. Its totient is φ = 876960.

The previous prime is 1369981. The next prime is 1370027. The reversal of 1369989 is 9899631.

It can be written as a sum of positive squares in 3 ways, for example, as 8100 + 1361889 = 90^2 + 1167^2 .

It is not a de Polignac number, because 1369989 - 2³ = 1369981 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 (1369981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 7479 + ... + 7659.

2^1369989 is an apocalyptic number.

It is an amenable number.

1369989 is a deficient number, since it is larger than the sum of its proper divisors (690797).

1369989 is a wasteful number, since it uses less digits than its factorization.

1369989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245 (or 213 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 1369989 is about 1170.4652920954. The cubic root of 1369989 is about 111.0637568951.

The spelling of 1369989 in words is "one million, three hundred sixty-nine thousand, nine hundred eighty-nine".