1397903 has 8 divisors (see below), whose sum is σ = 1514688. Its totient is φ = 1282464.

The previous prime is 1397881. The next prime is 1397909. The reversal of 1397903 is 3097931.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1397903 - 2⁶ = 1397839 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 1397903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3626 + ... + 3992.

It is an arithmetic number, because the mean of its divisors is an integer number (189336).

2^1397903 is an apocalyptic number.

1397903 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1397903 is a deficient number, since it is larger than the sum of its proper divisors (116785).

1397903 is a wasteful number, since it uses less digits than its factorization.

1397903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673.

The product of its (nonzero) digits is 5103, while the sum is 32.

The square root of 1397903 is about 1182.3294803057. The cubic root of 1397903 is about 111.8130117568.

The spelling of 1397903 in words is "one million, three hundred ninety-seven thousand, nine hundred three".