84210875893 has 2 divisors, whose sum is σ = 84210875894. Its totient is φ = 84210875892.

The previous prime is 84210875851. The next prime is 84210875899. The reversal of 84210875893 is 39857801248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78637058929 + 5573816964 = 280423^2 + 74658^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84210875893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84210875899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42105437946 + 42105437947.

It is an arithmetic number, because the mean of its divisors is an integer number (42105437947).

Almost surely, 2^84210875893 is an apocalyptic number.

It is an amenable number.

84210875893 is a deficient number, since it is larger than the sum of its proper divisors (1).

84210875893 is an equidigital number, since it uses as much as digits as its factorization.

84210875893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3870720, while the sum is 55.

The spelling of 84210875893 in words is "eighty-four billion, two hundred ten million, eight hundred seventy-five thousand, eight hundred ninety-three".