82172404793 has 2 divisors, whose sum is σ = 82172404794. Its totient is φ = 82172404792.

The previous prime is 82172404789. The next prime is 82172404861. The reversal of 82172404793 is 39740427128.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76944102544 + 5228302249 = 277388^2 + 72307^2 .

It is a cyclic number.

It is not a de Polignac number, because 82172404793 - 2² = 82172404789 is a prime.

It is not a weakly prime, because it can be changed into another prime (82172404703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41086202396 + 41086202397.

It is an arithmetic number, because the mean of its divisors is an integer number (41086202397).

Almost surely, 2^82172404793 is an apocalyptic number.

It is an amenable number.

82172404793 is a deficient number, since it is larger than the sum of its proper divisors (1).

82172404793 is an equidigital number, since it uses as much as digits as its factorization.

82172404793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 677376, while the sum is 47.

The spelling of 82172404793 in words is "eighty-two billion, one hundred seventy-two million, four hundred four thousand, seven hundred ninety-three".