1388993 has 8 divisors (see below), whose sum is σ = 1463616. Its totient is φ = 1315600.

The previous prime is 1388969. The next prime is 1389001. The reversal of 1388993 is 3998831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1388993 - 2¹⁶ = 1323457 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1388993.

It is not an unprimeable number, because it can be changed into a prime (1388953) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2783 + ... + 3243.

It is an arithmetic number, because the mean of its divisors is an integer number (182952).

2^1388993 is an apocalyptic number.

It is an amenable number.

1388993 is a deficient number, since it is larger than the sum of its proper divisors (74623).

1388993 is a wasteful number, since it uses less digits than its factorization.

1388993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615.

The product of its digits is 46656, while the sum is 41.

The square root of 1388993 is about 1178.5554717535. Note that the first 3 decimals coincide. The cubic root of 1388993 is about 111.5749460937.

The spelling of 1388993 in words is "one million, three hundred eighty-eight thousand, nine hundred ninety-three".