93400081 has 2 divisors, whose sum is σ = 93400082. Its totient is φ = 93400080.

The previous prime is 93400063. The next prime is 93400093. The reversal of 93400081 is 18000439.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49575681 + 43824400 = 7041^2 + 6620^2 .

It is an emirp because it is prime and its reverse (18000439) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 93400081 - 2⁵ = 93400049 is a prime.

It is a super-2 number, since 2×93400081² = 17447150261613122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (93400001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46700040 + 46700041.

It is an arithmetic number, because the mean of its divisors is an integer number (46700041).

Almost surely, 2^93400081 is an apocalyptic number.

It is an amenable number.

93400081 is a deficient number, since it is larger than the sum of its proper divisors (1).

93400081 is an equidigital number, since it uses as much as digits as its factorization.

93400081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 93400081 is about 9664.3717333306. The cubic root of 93400081 is about 453.7142479806.

The spelling of 93400081 in words is "ninety-three million, four hundred thousand, eighty-one".