93518681 has 2 divisors, whose sum is σ = 93518682. Its totient is φ = 93518680.

The previous prime is 93518671. The next prime is 93518693. The reversal of 93518681 is 18681539.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90421081 + 3097600 = 9509^2 + 1760^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-93518681 is a prime.

It is a super-2 number, since 2×93518681² = 17491487391959522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (93518611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46759340 + 46759341.

It is an arithmetic number, because the mean of its divisors is an integer number (46759341).

Almost surely, 2^93518681 is an apocalyptic number.

It is an amenable number.

93518681 is a deficient number, since it is larger than the sum of its proper divisors (1).

93518681 is an equidigital number, since it uses as much as digits as its factorization.

93518681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 41.

The square root of 93518681 is about 9670.5057261759. The cubic root of 93518681 is about 453.9062098040.

The spelling of 93518681 in words is "ninety-three million, five hundred eighteen thousand, six hundred eighty-one".