84681832819 has 2 divisors, whose sum is σ = 84681832820. Its totient is φ = 84681832818.

The previous prime is 84681832783. The next prime is 84681832831. The reversal of 84681832819 is 91823818648.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84681832819 - 2¹⁵ = 84681800051 is a prime.

It is a super-2 number, since 2×84681832819² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84681832619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42340916409 + 42340916410.

It is an arithmetic number, because the mean of its divisors is an integer number (42340916410).

Almost surely, 2^84681832819 is an apocalyptic number.

84681832819 is a deficient number, since it is larger than the sum of its proper divisors (1).

84681832819 is an equidigital number, since it uses as much as digits as its factorization.

84681832819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5308416, while the sum is 58.

The spelling of 84681832819 in words is "eighty-four billion, six hundred eighty-one million, eight hundred thirty-two thousand, eight hundred nineteen".