89122706721 has 24 divisors (see below), whose sum is σ = 129338602536. Its totient is φ = 59136168960.

The previous prime is 89122706689. The next prime is 89122706723. The reversal of 89122706721 is 12760722198.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 29031048225 + 60091658496 = 170385^2 + 245136^2 .

It is not a de Polignac number, because 89122706721 - 2⁵ = 89122706689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (89122706723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1692831 + ... + 1744683.

It is an arithmetic number, because the mean of its divisors is an integer number (5389108439).

Almost surely, 2^89122706721 is an apocalyptic number.

It is an amenable number.

89122706721 is a deficient number, since it is larger than the sum of its proper divisors (40215895815).

89122706721 is a wasteful number, since it uses less digits than its factorization.

89122706721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52753 (or 52750 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The spelling of 89122706721 in words is "eighty-nine billion, one hundred twenty-two million, seven hundred six thousand, seven hundred twenty-one".