1321017703 has 4 divisors (see below), whose sum is σ = 1326040848. Its totient is φ = 1315994560.

The previous prime is 1321017701. The next prime is 1321017707. The reversal of 1321017703 is 3077101231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3077101231 = 29 ⋅106106939.

It is a cyclic number.

It is not a de Polignac number, because 1321017703 - 2¹ = 1321017701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321017701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2511178 + ... + 2511703.

It is an arithmetic number, because the mean of its divisors is an integer number (331510212).

Almost surely, 2^1321017703 is an apocalyptic number.

1321017703 is a deficient number, since it is larger than the sum of its proper divisors (5023145).

1321017703 is an equidigital number, since it uses as much as digits as its factorization.

1321017703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5023144.

The product of its (nonzero) digits is 882, while the sum is 25.

The square root of 1321017703 is about 36345.8072272442. The cubic root of 1321017703 is about 1097.2431524144.

Adding to 1321017703 its reverse (3077101231), we get a palindrome (4398118934).

The spelling of 1321017703 in words is "one billion, three hundred twenty-one million, seventeen thousand, seven hundred three".