93005981 has 2 divisors, whose sum is σ = 93005982. Its totient is φ = 93005980.

The previous prime is 93005977. The next prime is 93006019. The reversal of 93005981 is 18950039.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92256025 + 749956 = 9605^2 + 866^2 .

It is an emirp because it is prime and its reverse (18950039) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 93005981 - 2² = 93005977 is a prime.

It is a super-2 number, since 2×93005981² = 17300225003544722, which 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 (93005971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46502990 + 46502991.

It is an arithmetic number, because the mean of its divisors is an integer number (46502991).

Almost surely, 2^93005981 is an apocalyptic number.

It is an amenable number.

93005981 is a deficient number, since it is larger than the sum of its proper divisors (1).

93005981 is an equidigital number, since it uses as much as digits as its factorization.

93005981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 93005981 is about 9643.9608564116. The cubic root of 93005981 is about 453.0752018901.

The spelling of 93005981 in words is "ninety-three million, five thousand, nine hundred eighty-one".