80306981 has 2 divisors, whose sum is σ = 80306982. Its totient is φ = 80306980.

The previous prime is 80306951. The next prime is 80307001. The reversal of 80306981 is 18960308.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53949025 + 26357956 = 7345^2 + 5134^2 .

It is a cyclic number.

It is not a de Polignac number, because 80306981 - 2⁶ = 80306917 is a prime.

It is a super-3 number, since 3×80306981³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80306911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40153490 + 40153491.

It is an arithmetic number, because the mean of its divisors is an integer number (40153491).

Almost surely, 2^80306981 is an apocalyptic number.

It is an amenable number.

80306981 is a deficient number, since it is larger than the sum of its proper divisors (1).

80306981 is an equidigital number, since it uses as much as digits as its factorization.

80306981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 80306981 is about 8961.4162385194. The cubic root of 80306981 is about 431.4373766427.

The spelling of 80306981 in words is "eighty million, three hundred six thousand, nine hundred eighty-one".