1312081798 has 16 divisors (see below), whose sum is σ = 2018442240. Its totient is φ = 639385096.

The previous prime is 1312081787. The next prime is 1312081801. The reversal of 1312081798 is 8971802131.

It is a self number, because there is not a number n which added to its sum of digits gives 1312081798.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6736 + ... + 51667.

It is an arithmetic number, because the mean of its divisors is an integer number (126152640).

Almost surely, 2^1312081798 is an apocalyptic number.

1312081798 is a deficient number, since it is larger than the sum of its proper divisors (706360442).

1312081798 is a wasteful number, since it uses less digits than its factorization.

1312081798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58691.

The product of its (nonzero) digits is 24192, while the sum is 40.

The square root of 1312081798 is about 36222.6696696972. The cubic root of 1312081798 is about 1094.7634854022.

The spelling of 1312081798 in words is "one billion, three hundred twelve million, eighty-one thousand, seven hundred ninety-eight".