89755319821 has 2 divisors, whose sum is σ = 89755319822. Its totient is φ = 89755319820.

The previous prime is 89755319777. The next prime is 89755319827. The reversal of 89755319821 is 12891355798.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63083857225 + 26671462596 = 251165^2 + 163314^2 .

It is a cyclic number.

It is not a de Polignac number, because 89755319821 - 2⁹ = 89755319309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89755319827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44877659910 + 44877659911.

It is an arithmetic number, because the mean of its divisors is an integer number (44877659911).

Almost surely, 2^89755319821 is an apocalyptic number.

It is an amenable number.

89755319821 is a deficient number, since it is larger than the sum of its proper divisors (1).

89755319821 is an equidigital number, since it uses as much as digits as its factorization.

89755319821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5443200, while the sum is 58.

The spelling of 89755319821 in words is "eighty-nine billion, seven hundred fifty-five million, three hundred nineteen thousand, eight hundred twenty-one".