93566981 has 2 divisors, whose sum is σ = 93566982. Its totient is φ = 93566980.

The previous prime is 93566971. The next prime is 93567037. The reversal of 93566981 is 18966539.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93508900 + 58081 = 9670^2 + 241^2 .

It is an emirp because it is prime and its reverse (18966539) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 93566981 - 2⁶ = 93566917 is a prime.

It is a super-2 number, since 2×93566981² = 17509559866908722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (93566971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46783490 + 46783491.

It is an arithmetic number, because the mean of its divisors is an integer number (46783491).

Almost surely, 2^93566981 is an apocalyptic number.

It is an amenable number.

93566981 is a deficient number, since it is larger than the sum of its proper divisors (1).

93566981 is an equidigital number, since it uses as much as digits as its factorization.

93566981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 47.

The square root of 93566981 is about 9673.0026878938. The cubic root of 93566981 is about 453.9843399930.

The spelling of 93566981 in words is "ninety-three million, five hundred sixty-six thousand, nine hundred eighty-one".