84723957793 has 2 divisors, whose sum is σ = 84723957794. Its totient is φ = 84723957792.

The previous prime is 84723957727. The next prime is 84723957803. The reversal of 84723957793 is 39775932748.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45957498129 + 38766459664 = 214377^2 + 196892^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84723957793 is a prime.

It is a super-2 number, since 2×84723957793² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84723957193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42361978896 + 42361978897.

It is an arithmetic number, because the mean of its divisors is an integer number (42361978897).

Almost surely, 2^84723957793 is an apocalyptic number.

It is an amenable number.

84723957793 is a deficient number, since it is larger than the sum of its proper divisors (1).

84723957793 is an equidigital number, since it uses as much as digits as its factorization.

84723957793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80015040, while the sum is 64.

The spelling of 84723957793 in words is "eighty-four billion, seven hundred twenty-three million, nine hundred fifty-seven thousand, seven hundred ninety-three".