1321161703 has 4 divisors (see below), whose sum is σ = 1324015648. Its totient is φ = 1318307760.

The previous prime is 1321161679. The next prime is 1321161719. The reversal of 1321161703 is 3071611231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1321161703 - 2¹⁷ = 1321030631 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 (1321161763) 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, 1426278 + ... + 1427203.

It is an arithmetic number, because the mean of its divisors is an integer number (331003912).

Almost surely, 2^1321161703 is an apocalyptic number.

1321161703 is a deficient number, since it is larger than the sum of its proper divisors (2853945).

1321161703 is an equidigital number, since it uses as much as digits as its factorization.

1321161703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2853944.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 1321161703 is about 36347.7881445350. The cubic root of 1321161703 is about 1097.2830199783.

Adding to 1321161703 its reverse (3071611231), we get a palindrome (4392772934).

The spelling of 1321161703 in words is "one billion, three hundred twenty-one million, one hundred sixty-one thousand, seven hundred three".