195871087 has 2 divisors, whose sum is σ = 195871088. Its totient is φ = 195871086.

The previous prime is 195871031. The next prime is 195871103. The reversal of 195871087 is 780178591.

It is a strong prime.

It is an emirp because it is prime and its reverse (780178591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 195871087 - 2¹⁹ = 195346799 is a prime.

It is a super-3 number, since 3×195871087³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195871987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97935543 + 97935544.

It is an arithmetic number, because the mean of its divisors is an integer number (97935544).

Almost surely, 2^195871087 is an apocalyptic number.

195871087 is a deficient number, since it is larger than the sum of its proper divisors (1).

195871087 is an equidigital number, since it uses as much as digits as its factorization.

195871087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 46.

The square root of 195871087 is about 13995.3952069958. The cubic root of 195871087 is about 580.7511937257.

The spelling of 195871087 in words is "one hundred ninety-five million, eight hundred seventy-one thousand, eighty-seven".