1391313303 has 12 divisors (see below), whose sum is σ = 2127891168. Its totient is φ = 872980800.

The previous prime is 1391313241. The next prime is 1391313347. The reversal of 1391313303 is 3033131931.

It is a happy number.

It is not a de Polignac number, because 1391313303 - 2⁸ = 1391313047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1391311303) 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 11 ways as a sum of consecutive naturals, for example, 4546623 + ... + 4546928.

It is an arithmetic number, because the mean of its divisors is an integer number (177324264).

Almost surely, 2^1391313303 is an apocalyptic number.

1391313303 is a deficient number, since it is larger than the sum of its proper divisors (736577865).

1391313303 is a wasteful number, since it uses less digits than its factorization.

1391313303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9093574 (or 9093571 counting only the distinct ones).

The product of its (nonzero) digits is 2187, while the sum is 27.

The square root of 1391313303 is about 37300.3123713462. The cubic root of 1391313303 is about 1116.3703991733.

The spelling of 1391313303 in words is "one billion, three hundred ninety-one million, three hundred thirteen thousand, three hundred three".