1338999 has 4 divisors (see below), whose sum is σ = 1785336. Its totient is φ = 892664.

The previous prime is 1338979. The next prime is 1339001. The reversal of 1338999 is 9998331.

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 1338999 - 2⁷ = 1338871 is a prime.

It is a D-number.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 1338999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1338979) 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, 223164 + ... + 223169.

It is an arithmetic number, because the mean of its divisors is an integer number (446334).

2^1338999 is an apocalyptic number.

1338999 is a deficient number, since it is larger than the sum of its proper divisors (446337).

1338999 is an equidigital number, since it uses as much as digits as its factorization.

1338999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446336.

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

The square root of 1338999 is about 1157.1512433559. The cubic root of 1338999 is about 110.2199181610.

The spelling of 1338999 in words is "one million, three hundred thirty-eight thousand, nine hundred ninety-nine".