1321363803 has 4 divisors (see below), whose sum is σ = 1761818408. Its totient is φ = 880909200.

The previous prime is 1321363789. The next prime is 1321363837. The reversal of 1321363803 is 3083631231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3083631231 = 3 ⋅1027877077.

It is not a de Polignac number, because 1321363803 - 2⁴ = 1321363787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321363843) 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, 220227298 + ... + 220227303.

It is an arithmetic number, because the mean of its divisors is an integer number (440454602).

Almost surely, 2^1321363803 is an apocalyptic number.

1321363803 is a deficient number, since it is larger than the sum of its proper divisors (440454605).

1321363803 is an equidigital number, since it uses as much as digits as its factorization.

1321363803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440454604.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 1321363803 is about 36350.5681248588. The cubic root of 1321363803 is about 1097.3389681112.

The spelling of 1321363803 in words is "one billion, three hundred twenty-one million, three hundred sixty-three thousand, eight hundred three".