93681689 has 2 divisors, whose sum is σ = 93681690. Its totient is φ = 93681688.

The previous prime is 93681607. The next prime is 93681697. The reversal of 93681689 is 98618639.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86174089 + 7507600 = 9283^2 + 2740^2 .

It is a cyclic number.

It is not a de Polignac number, because 93681689 - 2¹² = 93677593 is a prime.

It is not a weakly prime, because it can be changed into another prime (93641689) 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, 46840844 + 46840845.

It is an arithmetic number, because the mean of its divisors is an integer number (46840845).

Almost surely, 2^93681689 is an apocalyptic number.

It is an amenable number.

93681689 is a deficient number, since it is larger than the sum of its proper divisors (1).

93681689 is an equidigital number, since it uses as much as digits as its factorization.

93681689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872, while the sum is 50.

The square root of 93681689 is about 9678.9301578222. The cubic root of 93681689 is about 454.1697842205.

The spelling of 93681689 in words is "ninety-three million, six hundred eighty-one thousand, six hundred eighty-nine".