1310486861 has 2 divisors, whose sum is σ = 1310486862. Its totient is φ = 1310486860.

The previous prime is 1310486843. The next prime is 1310486923. The reversal of 1310486861 is 1686840131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1232712100 + 77774761 = 35110^2 + 8819^2 .

It is an emirp because it is prime and its reverse (1686840131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1310486861 - 2⁶ = 1310486797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1310486561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655243430 + 655243431.

It is an arithmetic number, because the mean of its divisors is an integer number (655243431).

Almost surely, 2^1310486861 is an apocalyptic number.

It is an amenable number.

1310486861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1310486861 is an equidigital number, since it uses as much as digits as its factorization.

1310486861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 1310486861 is about 36200.6472455949. The cubic root of 1310486861 is about 1094.3197156190.

The spelling of 1310486861 in words is "one billion, three hundred ten million, four hundred eighty-six thousand, eight hundred sixty-one".