96781891 has 2 divisors, whose sum is σ = 96781892. Its totient is φ = 96781890.

The previous prime is 96781843. The next prime is 96781897. The reversal of 96781891 is 19818769.

It is a strong prime.

It is an emirp because it is prime and its reverse (19818769) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 96781891 - 2⁹ = 96781379 is a prime.

It is not a weakly prime, because it can be changed into another prime (96781897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48390945 + 48390946.

It is an arithmetic number, because the mean of its divisors is an integer number (48390946).

Almost surely, 2^96781891 is an apocalyptic number.

96781891 is a deficient number, since it is larger than the sum of its proper divisors (1).

96781891 is an equidigital number, since it uses as much as digits as its factorization.

96781891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 49.

The square root of 96781891 is about 9837.7787635218. The cubic root of 96781891 is about 459.1254508426.

The spelling of 96781891 in words is "ninety-six million, seven hundred eighty-one thousand, eight hundred ninety-one".