89091895897 has 2 divisors, whose sum is σ = 89091895898. Its totient is φ = 89091895896.

The previous prime is 89091895883. The next prime is 89091895909. The reversal of 89091895897 is 79859819098.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87393549376 + 1698346521 = 295624^2 + 41211^2 .

It is a cyclic number.

It is not a de Polignac number, because 89091895897 - 2⁷ = 89091895769 is a prime.

It is not a weakly prime, because it can be changed into another prime (89091835897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44545947948 + 44545947949.

It is an arithmetic number, because the mean of its divisors is an integer number (44545947949).

Almost surely, 2^89091895897 is an apocalyptic number.

It is an amenable number.

89091895897 is a deficient number, since it is larger than the sum of its proper divisors (1).

89091895897 is an equidigital number, since it uses as much as digits as its factorization.

89091895897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 117573120, while the sum is 73.

The spelling of 89091895897 in words is "eighty-nine billion, ninety-one million, eight hundred ninety-five thousand, eight hundred ninety-seven".