1375993 has 4 divisors (see below), whose sum is σ = 1413220. Its totient is φ = 1338768.

The previous prime is 1375987. The next prime is 1376003. The reversal of 1375993 is 3995731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3995731 = 17 ⋅235043.

It can be written as a sum of positive squares in 2 ways, for example, as 1225449 + 150544 = 1107^2 + 388^2 .

It is a cyclic number.

It is not a de Polignac number, because 1375993 - 2⁹ = 1375481 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 37189 = 1375993 / (1 + 3 + 7 + 5 + 9 + 9 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1379993) 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, 18558 + ... + 18631.

It is an arithmetic number, because the mean of its divisors is an integer number (353305).

2^1375993 is an apocalyptic number.

It is an amenable number.

1375993 is a deficient number, since it is larger than the sum of its proper divisors (37227).

1375993 is an equidigital number, since it uses as much as digits as its factorization.

1375993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37226.

The product of its digits is 25515, while the sum is 37.

The square root of 1375993 is about 1173.0272801602. The cubic root of 1375993 is about 111.2257667202.

The spelling of 1375993 in words is "one million, three hundred seventy-five thousand, nine hundred ninety-three".