88744409989 has 2 divisors, whose sum is σ = 88744409990. Its totient is φ = 88744409988.

The previous prime is 88744409981. The next prime is 88744410023. The reversal of 88744409989 is 98990444788.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77114513025 + 11629896964 = 277695^2 + 107842^2 .

It is a cyclic number.

It is not a de Polignac number, because 88744409989 - 2³ = 88744409981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88744409981) by changing a digit.

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, 44372204994 + 44372204995.

It is an arithmetic number, because the mean of its divisors is an integer number (44372204995).

Almost surely, 2^88744409989 is an apocalyptic number.

It is an amenable number.

88744409989 is a deficient number, since it is larger than the sum of its proper divisors (1).

88744409989 is an equidigital number, since it uses as much as digits as its factorization.

88744409989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 167215104, while the sum is 70.

The spelling of 88744409989 in words is "eighty-eight billion, seven hundred forty-four million, four hundred nine thousand, nine hundred eighty-nine".