1315605947 has 2 divisors, whose sum is σ = 1315605948. Its totient is φ = 1315605946.

The previous prime is 1315605943. The next prime is 1315605959. The reversal of 1315605947 is 7495065131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1315605947 - 2² = 1315605943 is a prime.

It is not a weakly prime, because it can be changed into another prime (1315605943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657802973 + 657802974.

It is an arithmetic number, because the mean of its divisors is an integer number (657802974).

Almost surely, 2^1315605947 is an apocalyptic number.

1315605947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1315605947 is an equidigital number, since it uses as much as digits as its factorization.

1315605947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 113400, while the sum is 41.

The square root of 1315605947 is about 36271.2826765197. The cubic root of 1315605947 is about 1095.7427588489.

The spelling of 1315605947 in words is "one billion, three hundred fifteen million, six hundred five thousand, nine hundred forty-seven".