1383999 has 4 divisors (see below), whose sum is σ = 1845336. Its totient is φ = 922664.

The previous prime is 1383983. The next prime is 1384013. The reversal of 1383999 is 9993831.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1383999 - 2⁴ = 1383983 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 1383999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1383959) 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 3 ways as a sum of consecutive naturals, for example, 230664 + ... + 230669.

It is an arithmetic number, because the mean of its divisors is an integer number (461334).

2^1383999 is an apocalyptic number.

1383999 is a deficient number, since it is larger than the sum of its proper divisors (461337).

1383999 is an equidigital number, since it uses as much as digits as its factorization.

1383999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461336.

The product of its digits is 52488, while the sum is 42.

The square root of 1383999 is about 1176.4348685754. The cubic root of 1383999 is about 111.4410662705.

The spelling of 1383999 in words is "one million, three hundred eighty-three thousand, nine hundred ninety-nine".