89567803421 has 2 divisors, whose sum is σ = 89567803422. Its totient is φ = 89567803420.

The previous prime is 89567803379. The next prime is 89567803447. The reversal of 89567803421 is 12430876598.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67896724900 + 21671078521 = 260570^2 + 147211^2 .

It is a cyclic number.

It is not a de Polignac number, because 89567803421 - 2²² = 89563609117 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is a weakly prime.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44783901710 + 44783901711.

It is an arithmetic number, because the mean of its divisors is an integer number (44783901711).

It is a 2-persistent number, because it is pandigital, and so is 2⋅89567803421 = 179135606842, but 3⋅89567803421 = 268703410263 is not.

Almost surely, 2^89567803421 is an apocalyptic number.

It is an amenable number.

89567803421 is a deficient number, since it is larger than the sum of its proper divisors (1).

89567803421 is an equidigital number, since it uses as much as digits as its factorization.

89567803421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2903040, while the sum is 53.

The spelling of 89567803421 in words is "eighty-nine billion, five hundred sixty-seven million, eight hundred three thousand, four hundred twenty-one".