1312000999 has 2 divisors, whose sum is σ = 1312001000. Its totient is φ = 1312000998.

The previous prime is 1312000981. The next prime is 1312001021. The reversal of 1312000999 is 9990002131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1312000999 - 2¹⁷ = 1311869927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312000909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656000499 + 656000500.

It is an arithmetic number, because the mean of its divisors is an integer number (656000500).

Almost surely, 2^1312000999 is an apocalyptic number.

1312000999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312000999 is an equidigital number, since it uses as much as digits as its factorization.

1312000999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 1312000999 is about 36221.5543426839. The cubic root of 1312000999 is about 1094.7410128168.

The spelling of 1312000999 in words is "one billion, three hundred twelve million, nine hundred ninety-nine", and thus it is an aban number.