84175000981 has 2 divisors, whose sum is σ = 84175000982. Its totient is φ = 84175000980.

The previous prime is 84175000919. The next prime is 84175001017. The reversal of 84175000981 is 18900057148.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44865594225 + 39309406756 = 211815^2 + 198266^2 .

It is a cyclic number.

It is not a de Polignac number, because 84175000981 - 2¹¹ = 84174998933 is a prime.

It is a super-2 number, since 2×84175000981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84175000681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42087500490 + 42087500491.

It is an arithmetic number, because the mean of its divisors is an integer number (42087500491).

Almost surely, 2^84175000981 is an apocalyptic number.

It is an amenable number.

84175000981 is a deficient number, since it is larger than the sum of its proper divisors (1).

84175000981 is an equidigital number, since it uses as much as digits as its factorization.

84175000981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 43.

The spelling of 84175000981 in words is "eighty-four billion, one hundred seventy-five million, nine hundred eighty-one", and thus it is an aban number.