1312019999 has 8 divisors (see below), whose sum is σ = 1421505360. Its totient is φ = 1206124416.

The previous prime is 1312019987. The next prime is 1312020019. The reversal of 1312019999 is 9999102131.

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 1312019999 - 2¹⁶ = 1311954463 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 (1312019909) 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, 896684 + ... + 898145.

It is an arithmetic number, because the mean of its divisors is an integer number (177688170).

Almost surely, 2^1312019999 is an apocalyptic number.

1312019999 is a deficient number, since it is larger than the sum of its proper divisors (109485361).

1312019999 is a wasteful number, since it uses less digits than its factorization.

1312019999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1794889.

The product of its (nonzero) digits is 39366, while the sum is 44.

The square root of 1312019999 is about 36221.8166165089. The cubic root of 1312019999 is about 1094.7462973603.

The spelling of 1312019999 in words is "one billion, three hundred twelve million, nineteen thousand, nine hundred ninety-nine".