1995953887 has 4 divisors (see below), whose sum is σ = 1996047040. Its totient is φ = 1995860736.

The previous prime is 1995953831. The next prime is 1995953909. The reversal of 1995953887 is 7883595991.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7883595991 = 1069 ⋅7374739.

It is a cyclic number.

It is not a de Polignac number, because 1995953887 - 2¹⁵ = 1995921119 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 (1995953807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3538 + ... + 63280.

It is an arithmetic number, because the mean of its divisors is an integer number (499011760).

Almost surely, 2^1995953887 is an apocalyptic number.

1995953887 is a deficient number, since it is larger than the sum of its proper divisors (93153).

1995953887 is an equidigital number, since it uses as much as digits as its factorization.

1995953887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93152.

The product of its digits is 24494400, while the sum is 64.

The square root of 1995953887 is about 44676.0997290498. The cubic root of 1995953887 is about 1259.0708458101.

The spelling of 1995953887 in words is "one billion, nine hundred ninety-five million, nine hundred fifty-three thousand, eight hundred eighty-seven".