84723957089 has 2 divisors, whose sum is σ = 84723957090. Its totient is φ = 84723957088.

The previous prime is 84723957079. The next prime is 84723957113. The reversal of 84723957089 is 98075932748.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55134796864 + 29589160225 = 234808^2 + 172015^2 .

It is a cyclic number.

It is not a de Polignac number, because 84723957089 - 2⁸ = 84723956833 is a prime.

It is not a weakly prime, because it can be changed into another prime (84723957079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42361978544 + 42361978545.

It is an arithmetic number, because the mean of its divisors is an integer number (42361978545).

Almost surely, 2^84723957089 is an apocalyptic number.

It is an amenable number.

84723957089 is a deficient number, since it is larger than the sum of its proper divisors (1).

84723957089 is an equidigital number, since it uses as much as digits as its factorization.

84723957089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30481920, while the sum is 62.

The spelling of 84723957089 in words is "eighty-four billion, seven hundred twenty-three million, nine hundred fifty-seven thousand, eighty-nine".