1995860873 has 2 divisors, whose sum is σ = 1995860874. Its totient is φ = 1995860872.

The previous prime is 1995860837. The next prime is 1995860929. The reversal of 1995860873 is 3780685991.

Together with previous prime (1995860837) it forms an Ormiston pair, because they use the same digits, order apart.

It is an a-pointer prime, because the next prime (1995860929) can be obtained adding 1995860873 to its sum of digits (56).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1154164729 + 841696144 = 33973^2 + 29012^2 .

It is an emirp because it is prime and its reverse (3780685991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1995860873 - 2²⁰ = 1994812297 is a prime.

It is not a weakly prime, because it can be changed into another prime (1995860173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997930436 + 997930437.

It is an arithmetic number, because the mean of its divisors is an integer number (997930437).

Almost surely, 2^1995860873 is an apocalyptic number.

It is an amenable number.

1995860873 is a deficient number, since it is larger than the sum of its proper divisors (1).

1995860873 is an equidigital number, since it uses as much as digits as its factorization.

1995860873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3265920, while the sum is 56.

The square root of 1995860873 is about 44675.0587352720. The cubic root of 1995860873 is about 1259.0512874032.

The spelling of 1995860873 in words is "one billion, nine hundred ninety-five million, eight hundred sixty thousand, eight hundred seventy-three".