89408125921 has 2 divisors, whose sum is σ = 89408125922. Its totient is φ = 89408125920.

The previous prime is 89408125907. The next prime is 89408125951. The reversal of 89408125921 is 12952180498.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67425912225 + 21982213696 = 259665^2 + 148264^2 .

It is a cyclic number.

It is not a de Polignac number, because 89408125921 - 2¹⁵ = 89408093153 is a prime.

It is not a weakly prime, because it can be changed into another prime (89408125951) 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, 44704062960 + 44704062961.

It is an arithmetic number, because the mean of its divisors is an integer number (44704062961).

Almost surely, 2^89408125921 is an apocalyptic number.

It is an amenable number.

89408125921 is a deficient number, since it is larger than the sum of its proper divisors (1).

89408125921 is an equidigital number, since it uses as much as digits as its factorization.

89408125921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 414720, while the sum is 49.

The spelling of 89408125921 in words is "eighty-nine billion, four hundred eight million, one hundred twenty-five thousand, nine hundred twenty-one".