1310347861 has 8 divisors (see below), whose sum is σ = 1360167480. Its totient is φ = 1260837312.

The previous prime is 1310347849. The next prime is 1310347889. The reversal of 1310347861 is 1687430131.

It can be written as a sum of positive squares in 4 ways, for example, as 369024100 + 941323761 = 19210^2 + 30681^2 .

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 1310347861 - 2¹³ = 1310339669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1310347561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68610 + ... + 85603.

It is an arithmetic number, because the mean of its divisors is an integer number (170020935).

Almost surely, 2^1310347861 is an apocalyptic number.

It is an amenable number.

1310347861 is a deficient number, since it is larger than the sum of its proper divisors (49819619).

1310347861 is a wasteful number, since it uses less digits than its factorization.

1310347861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154535.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 1310347861 is about 36198.7273395074. The cubic root of 1310347861 is about 1094.2810236836.

Adding to 1310347861 its reverse (1687430131), we get a palindrome (2997777992).

The spelling of 1310347861 in words is "one billion, three hundred ten million, three hundred forty-seven thousand, eight hundred sixty-one".