89644769 has 2 divisors, whose sum is σ = 89644770. Its totient is φ = 89644768.

The previous prime is 89644759. The next prime is 89644787. The reversal of 89644769 is 96744698.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85803169 + 3841600 = 9263^2 + 1960^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89644769 is a prime.

It is a super-2 number, since 2×89644769² = 16072369218126722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 89644769.

It is not a weakly prime, because it can be changed into another prime (89644729) 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, 44822384 + 44822385.

It is an arithmetic number, because the mean of its divisors is an integer number (44822385).

Almost surely, 2^89644769 is an apocalyptic number.

It is an amenable number.

89644769 is a deficient number, since it is larger than the sum of its proper divisors (1).

89644769 is an equidigital number, since it uses as much as digits as its factorization.

89644769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2612736, while the sum is 53.

The square root of 89644769 is about 9468.0921520653. The cubic root of 89644769 is about 447.5500920799.

The spelling of 89644769 in words is "eighty-nine million, six hundred forty-four thousand, seven hundred sixty-nine".