1307728803 has 4 divisors (see below), whose sum is σ = 1743638408. Its totient is φ = 871819200.

The previous prime is 1307728783. The next prime is 1307728817. The reversal of 1307728803 is 3088277031.

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

It is not a de Polignac number, because 1307728803 - 2⁶ = 1307728739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1307728843) 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, 217954798 + ... + 217954803.

It is an arithmetic number, because the mean of its divisors is an integer number (435909602).

Almost surely, 2^1307728803 is an apocalyptic number.

1307728803 is a deficient number, since it is larger than the sum of its proper divisors (435909605).

1307728803 is an equidigital number, since it uses as much as digits as its factorization.

1307728803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435909604.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 1307728803 is about 36162.5331385953. The cubic root of 1307728803 is about 1093.5514726128.

The spelling of 1307728803 in words is "one billion, three hundred seven million, seven hundred twenty-eight thousand, eight hundred three".