84190041857 has 2 divisors, whose sum is σ = 84190041858. Its totient is φ = 84190041856.

The previous prime is 84190041821. The next prime is 84190041877. The reversal of 84190041857 is 75814009148.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78960438001 + 5229603856 = 280999^2 + 72316^2 .

It is a cyclic number.

It is not a de Polignac number, because 84190041857 - 2⁸ = 84190041601 is a prime.

It is not a weakly prime, because it can be changed into another prime (84190041877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42095020928 + 42095020929.

It is an arithmetic number, because the mean of its divisors is an integer number (42095020929).

Almost surely, 2^84190041857 is an apocalyptic number.

It is an amenable number.

84190041857 is a deficient number, since it is larger than the sum of its proper divisors (1).

84190041857 is an equidigital number, since it uses as much as digits as its factorization.

84190041857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 322560, while the sum is 47.

The spelling of 84190041857 in words is "eighty-four billion, one hundred ninety million, forty-one thousand, eight hundred fifty-seven".