1995837887 has 2 divisors, whose sum is σ = 1995837888. Its totient is φ = 1995837886.

The previous prime is 1995837869. The next prime is 1995837911. The reversal of 1995837887 is 7887385991.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1995837887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1995837827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997918943 + 997918944.

It is an arithmetic number, because the mean of its divisors is an integer number (997918944).

Almost surely, 2^1995837887 is an apocalyptic number.

1995837887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1995837887 is an equidigital number, since it uses as much as digits as its factorization.

1995837887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30481920, while the sum is 65.

The square root of 1995837887 is about 44674.8014768952. The cubic root of 1995837887 is about 1259.0464539560.

The spelling of 1995837887 in words is "one billion, nine hundred ninety-five million, eight hundred thirty-seven thousand, eight hundred eighty-seven".