1317438347 has 4 divisors (see below), whose sum is σ = 1317603816. Its totient is φ = 1317272880.

The previous prime is 1317438337. The next prime is 1317438349. The reversal of 1317438347 is 7438347131.

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 1317438347 - 2¹⁰ = 1317437323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1317438349) 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, 70154 + ... + 86927.

It is an arithmetic number, because the mean of its divisors is an integer number (329400954).

Almost surely, 2^1317438347 is an apocalyptic number.

1317438347 is a deficient number, since it is larger than the sum of its proper divisors (165469).

1317438347 is an equidigital number, since it uses as much as digits as its factorization.

1317438347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165468.

The product of its digits is 169344, while the sum is 41.

The square root of 1317438347 is about 36296.5335397197. The cubic root of 1317438347 is about 1096.2512463565.

The spelling of 1317438347 in words is "one billion, three hundred seventeen million, four hundred thirty-eight thousand, three hundred forty-seven".