84230913116981 has 2 divisors, whose sum is σ = 84230913116982. Its totient is φ = 84230913116980.

The previous prime is 84230913116971. The next prime is 84230913117067. The reversal of 84230913116981 is 18961131903248.

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., 82907398622500 + 1323514494481 = 9105350^2 + 1150441^2 .

It is a cyclic number.

It is not a de Polignac number, because 84230913116981 - 2²⁶ = 84230846008117 is a prime.

It is a super-2 number, since 2×84230913116981² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84230913116971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42115456558490 + 42115456558491.

It is an arithmetic number, because the mean of its divisors is an integer number (42115456558491).

Almost surely, 2^{84230913116981} is an apocalyptic number.

It is an amenable number.

84230913116981 is a deficient number, since it is larger than the sum of its proper divisors (1).

84230913116981 is an equidigital number, since it uses as much as digits as its factorization.

84230913116981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2239488, while the sum is 56.

The spelling of 84230913116981 in words is "eighty-four trillion, two hundred thirty billion, nine hundred thirteen million, one hundred sixteen thousand, nine hundred eighty-one".