1313865385 has 16 divisors (see below), whose sum is σ = 1804663296. Its totient is φ = 899540928.

The previous prime is 1313865359. The next prime is 1313865431. The reversal of 1313865385 is 5835683131.

It is a cyclic number.

It is not a de Polignac number, because 1313865385 - 2¹¹ = 1313863337 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5889 + ... + 51598.

It is an arithmetic number, because the mean of its divisors is an integer number (112791456).

Almost surely, 2^1313865385 is an apocalyptic number.

It is an amenable number.

1313865385 is a deficient number, since it is larger than the sum of its proper divisors (490797911).

1313865385 is an equidigital number, since it uses as much as digits as its factorization.

1313865385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58152.

The product of its digits is 259200, while the sum is 43.

The square root of 1313865385 is about 36247.2810704472. The cubic root of 1313865385 is about 1095.2593187739.

The spelling of 1313865385 in words is "one billion, three hundred thirteen million, eight hundred sixty-five thousand, three hundred eighty-five".