1393903 has 6 divisors (see below), whose sum is σ = 1621536. Its totient is φ = 1194732.

The previous prime is 1393891. The next prime is 1393913. The reversal of 1393903 is 3093931.

It is a happy number.

It is not a de Polignac number, because 1393903 - 2⁵ = 1393871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1393913) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14175 + ... + 14272.

It is an arithmetic number, because the mean of its divisors is an integer number (270256).

2^1393903 is an apocalyptic number.

1393903 is a deficient number, since it is larger than the sum of its proper divisors (227633).

1393903 is an equidigital number, since it uses as much as digits as its factorization.

1393903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28461 (or 28454 counting only the distinct ones).

The product of its (nonzero) digits is 2187, while the sum is 28.

The square root of 1393903 is about 1180.6366926366. The cubic root of 1393903 is about 111.7062615460.

Adding to 1393903 its sum of digits (28), we get a palindrome (1393931).

The spelling of 1393903 in words is "one million, three hundred ninety-three thousand, nine hundred three".