89764681 has 2 divisors, whose sum is σ = 89764682. Its totient is φ = 89764680.

The previous prime is 89764679. The next prime is 89764687. The reversal of 89764681 is 18646798.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84548025 + 5216656 = 9195^2 + 2284^2 .

It is a cyclic number.

It is not a de Polignac number, because 89764681 - 2¹ = 89764679 is a prime.

It is a super-3 number, since 3×89764681³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 89764679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (89764687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44882340 + 44882341.

It is an arithmetic number, because the mean of its divisors is an integer number (44882341).

Almost surely, 2^89764681 is an apocalyptic number.

It is an amenable number.

89764681 is a deficient number, since it is larger than the sum of its proper divisors (1).

89764681 is an equidigital number, since it uses as much as digits as its factorization.

89764681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 49.

The square root of 89764681 is about 9474.4224626095. The cubic root of 89764681 is about 447.7495560911.

The spelling of 89764681 in words is "eighty-nine million, seven hundred sixty-four thousand, six hundred eighty-one".