1320878003 has 4 divisors (see below), whose sum is σ = 1334495400. Its totient is φ = 1307260608.

The previous prime is 1320877991. The next prime is 1320878011. The reversal of 1320878003 is 3008780231.

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 1320878003 - 2⁶ = 1320877939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320878093) 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, 6808553 + ... + 6808746.

It is an arithmetic number, because the mean of its divisors is an integer number (333623850).

Almost surely, 2^1320878003 is an apocalyptic number.

1320878003 is a deficient number, since it is larger than the sum of its proper divisors (13617397).

1320878003 is an equidigital number, since it uses as much as digits as its factorization.

1320878003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13617396.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 1320878003 is about 36343.8853591632. The cubic root of 1320878003 is about 1097.2044725714.

The spelling of 1320878003 in words is "one billion, three hundred twenty million, eight hundred seventy-eight thousand, three".