82946108981 has 2 divisors, whose sum is σ = 82946108982. Its totient is φ = 82946108980.

The previous prime is 82946108957. The next prime is 82946109073. The reversal of 82946108981 is 18980164928.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80162596900 + 2783512081 = 283130^2 + 52759^2 .

It is a cyclic number.

It is not a de Polignac number, because 82946108981 - 2¹⁴ = 82946092597 is a prime.

It is a super-2 number, since 2×82946108981² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82946108941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41473054490 + 41473054491.

It is an arithmetic number, because the mean of its divisors is an integer number (41473054491).

Almost surely, 2^82946108981 is an apocalyptic number.

It is an amenable number.

82946108981 is a deficient number, since it is larger than the sum of its proper divisors (1).

82946108981 is an equidigital number, since it uses as much as digits as its factorization.

82946108981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1990656, while the sum is 56.

The spelling of 82946108981 in words is "eighty-two billion, nine hundred forty-six million, one hundred eight thousand, nine hundred eighty-one".