1363869 has 12 divisors (see below), whose sum is σ = 2121756. Its totient is φ = 839232.

The previous prime is 1363867. The next prime is 1363883. The reversal of 1363869 is 9683631.

It is a happy number.

1363869 is a `hidden beast` number, since 13 + 638 + 6 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 580644 + 783225 = 762^2 + 885^2 .

It is not a de Polignac number, because 1363869 - 2¹ = 1363867 is a prime.

It is a super-2 number, since 2×1363869² = 3720277298322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1363867) 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 11 ways as a sum of consecutive naturals, for example, 5712 + ... + 5945.

It is an arithmetic number, because the mean of its divisors is an integer number (176813).

2^1363869 is an apocalyptic number.

It is an amenable number.

1363869 is a deficient number, since it is larger than the sum of its proper divisors (757887).

1363869 is a wasteful number, since it uses less digits than its factorization.

1363869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11676 (or 11673 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 1363869 is about 1167.8480209342. The cubic root of 1363869 is about 110.8981290828.

It can be divided in two parts, 136 and 3869, that added together give a triangular number (4005 = T₈₉).

The spelling of 1363869 in words is "one million, three hundred sixty-three thousand, eight hundred sixty-nine".