195090887 has 4 divisors (see below), whose sum is σ = 195174216. Its totient is φ = 195007560.

The previous prime is 195090817. The next prime is 195090901. The reversal of 195090887 is 788090591.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 788090591 = 7561 ⋅104231.

It is a cyclic number.

It is not a de Polignac number, because 195090887 - 2¹² = 195086791 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 (195090817) 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, 38048 + ... + 42869.

It is an arithmetic number, because the mean of its divisors is an integer number (48793554).

Almost surely, 2^195090887 is an apocalyptic number.

195090887 is a deficient number, since it is larger than the sum of its proper divisors (83329).

195090887 is an equidigital number, since it uses as much as digits as its factorization.

195090887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83328.

The product of its (nonzero) digits is 181440, while the sum is 47.

The square root of 195090887 is about 13967.4939412910. The cubic root of 195090887 is about 579.9790787142.

The spelling of 195090887 in words is "one hundred ninety-five million, ninety thousand, eight hundred eighty-seven".