82438063993 has 2 divisors, whose sum is σ = 82438063994. Its totient is φ = 82438063992.

The previous prime is 82438063937. The next prime is 82438064017. The reversal of 82438063993 is 39936083428.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48871060624 + 33567003369 = 221068^2 + 183213^2 .

It is a cyclic number.

It is not a de Polignac number, because 82438063993 - 2¹³ = 82438055801 is a prime.

It is not a weakly prime, because it can be changed into another prime (82438063913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41219031996 + 41219031997.

It is an arithmetic number, because the mean of its divisors is an integer number (41219031997).

Almost surely, 2^82438063993 is an apocalyptic number.

It is an amenable number.

82438063993 is a deficient number, since it is larger than the sum of its proper divisors (1).

82438063993 is an equidigital number, since it uses as much as digits as its factorization.

82438063993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6718464, while the sum is 55.

The spelling of 82438063993 in words is "eighty-two billion, four hundred thirty-eight million, sixty-three thousand, nine hundred ninety-three".