1315748009 has 16 divisors (see below), whose sum is σ = 1400818320. Its totient is φ = 1233469440.

The previous prime is 1315747991. The next prime is 1315748023. The reversal of 1315748009 is 9008475131.

It can be written as a sum of positive squares in 8 ways, for example, as 523494400 + 792253609 = 22880^2 + 28147^2 .

It is a cyclic number.

It is not a de Polignac number, because 1315748009 - 2⁸ = 1315747753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1315748209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 686837 + ... + 688749.

It is an arithmetic number, because the mean of its divisors is an integer number (87551145).

Almost surely, 2^1315748009 is an apocalyptic number.

It is an amenable number.

1315748009 is a deficient number, since it is larger than the sum of its proper divisors (85070311).

1315748009 is a wasteful number, since it uses less digits than its factorization.

1315748009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2620.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 1315748009 is about 36273.2409497690. The cubic root of 1315748009 is about 1095.7821976604.

The spelling of 1315748009 in words is "one billion, three hundred fifteen million, seven hundred forty-eight thousand, nine".