1383661 has 4 divisors (see below), whose sum is σ = 1386112. Its totient is φ = 1381212.

The previous prime is 1383659. The next prime is 1383667. The reversal of 1383661 is 1663831.

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 1383661 - 2¹ = 1383659 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 (1383667) 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, 100 + ... + 1666.

It is an arithmetic number, because the mean of its divisors is an integer number (346528).

2^1383661 is an apocalyptic number.

It is an amenable number.

1383661 is a deficient number, since it is larger than the sum of its proper divisors (2451).

1383661 is an equidigital number, since it uses as much as digits as its factorization.

1383661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2450.

The product of its digits is 2592, while the sum is 28.

The square root of 1383661 is about 1176.2912054419. The cubic root of 1383661 is about 111.4319934925.

The spelling of 1383661 in words is "one million, three hundred eighty-three thousand, six hundred sixty-one".