1310199985 has 8 divisors (see below), whose sum is σ = 1593777960. Its totient is φ = 1033801344.

The previous prime is 1310199973. The next prime is 1310199997. The reversal of 1310199985 is 5899910131.

It is an interprime number because it is at equal distance from previous prime (1310199973) and next prime (1310199997).

It can be written as a sum of positive squares in 4 ways, for example, as 149230656 + 1160969329 = 12216^2 + 34073^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1310199985 - 2⁵ = 1310199953 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1794430 + ... + 1795159.

It is an arithmetic number, because the mean of its divisors is an integer number (199222245).

Almost surely, 2^1310199985 is an apocalyptic number.

It is an amenable number.

1310199985 is a deficient number, since it is larger than the sum of its proper divisors (283577975).

1310199985 is an equidigital number, since it uses as much as digits as its factorization.

1310199985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3589667.

The product of its (nonzero) digits is 87480, while the sum is 46.

The square root of 1310199985 is about 36196.6847238804. The cubic root of 1310199985 is about 1094.2398580275.

It can be divided in two parts, 1310 and 199985, that added together give a triangular number (201295 = T₆₃₄).

The spelling of 1310199985 in words is "one billion, three hundred ten million, one hundred ninety-nine thousand, nine hundred eighty-five".