89865707647 has 2 divisors, whose sum is σ = 89865707648. Its totient is φ = 89865707646.

The previous prime is 89865707641. The next prime is 89865707669. The reversal of 89865707647 is 74670756898.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89865707647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89865707641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44932853823 + 44932853824.

It is an arithmetic number, because the mean of its divisors is an integer number (44932853824).

Almost surely, 2^89865707647 is an apocalyptic number.

89865707647 is a deficient number, since it is larger than the sum of its proper divisors (1).

89865707647 is an equidigital number, since it uses as much as digits as its factorization.

89865707647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 142248960, while the sum is 67.

The spelling of 89865707647 in words is "eighty-nine billion, eight hundred sixty-five million, seven hundred seven thousand, six hundred forty-seven".