1315923647 has 4 divisors (see below), whose sum is σ = 1328952696. Its totient is φ = 1302894600.

The previous prime is 1315923599. The next prime is 1315923673. The reversal of 1315923647 is 7463295131.

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 1315923647 - 2²⁰ = 1314875071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1315923047) 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, 6514373 + ... + 6514574.

It is an arithmetic number, because the mean of its divisors is an integer number (332238174).

Almost surely, 2^1315923647 is an apocalyptic number.

1315923647 is a deficient number, since it is larger than the sum of its proper divisors (13029049).

1315923647 is a wasteful number, since it uses less digits than its factorization.

1315923647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13029048.

The product of its digits is 136080, while the sum is 41.

The square root of 1315923647 is about 36275.6619098811. The cubic root of 1315923647 is about 1095.8309538126.

The spelling of 1315923647 in words is "one billion, three hundred fifteen million, nine hundred twenty-three thousand, six hundred forty-seven".