89721268573 has 2 divisors, whose sum is σ = 89721268574. Its totient is φ = 89721268572.

The previous prime is 89721268501. The next prime is 89721268591. The reversal of 89721268573 is 37586212798.

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., 61208244409 + 28513024164 = 247403^2 + 168858^2 .

It is a cyclic number.

It is not a de Polignac number, because 89721268573 - 2⁹ = 89721268061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89721265573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44860634286 + 44860634287.

It is an arithmetic number, because the mean of its divisors is an integer number (44860634287).

Almost surely, 2^89721268573 is an apocalyptic number.

It is an amenable number.

89721268573 is a deficient number, since it is larger than the sum of its proper divisors (1).

89721268573 is an equidigital number, since it uses as much as digits as its factorization.

89721268573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10160640, while the sum is 58.

The spelling of 89721268573 in words is "eighty-nine billion, seven hundred twenty-one million, two hundred sixty-eight thousand, five hundred seventy-three".