1312081799 has 8 divisors (see below), whose sum is σ = 1502736768. Its totient is φ = 1122230520.

The previous prime is 1312081787. The next prime is 1312081801. The reversal of 1312081799 is 9971802131.

It is a happy number.

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 1312081799 - 2⁸ = 1312081543 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 (1312081769) 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, 197417 + ... + 203954.

It is an arithmetic number, because the mean of its divisors is an integer number (187842096).

Almost surely, 2^1312081799 is an apocalyptic number.

1312081799 is a deficient number, since it is larger than the sum of its proper divisors (190654969).

1312081799 is an equidigital number, since it uses as much as digits as its factorization.

1312081799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401845.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 1312081799 is about 36222.6696835007. The cubic root of 1312081799 is about 1094.7634856803.

The spelling of 1312081799 in words is "one billion, three hundred twelve million, eighty-one thousand, seven hundred ninety-nine".