89383981 has 2 divisors, whose sum is σ = 89383982. Its totient is φ = 89383980.

The previous prime is 89383979. The next prime is 89383991. The reversal of 89383981 is 18938398.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61873956 + 27510025 = 7866^2 + 5245^2 .

It is a cyclic number.

It is not a de Polignac number, because 89383981 - 2¹ = 89383979 is a prime.

It is a super-2 number, since 2×89383981² = 15978992118816722, which contains 22 as substring.

Together with 89383979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89383991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44691990 + 44691991.

It is an arithmetic number, because the mean of its divisors is an integer number (44691991).

Almost surely, 2^89383981 is an apocalyptic number.

It is an amenable number.

89383981 is a deficient number, since it is larger than the sum of its proper divisors (1).

89383981 is an equidigital number, since it uses as much as digits as its factorization.

89383981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 49.

The square root of 89383981 is about 9454.3101810761. The cubic root of 89383981 is about 447.1156772288.

The spelling of 89383981 in words is "eighty-nine million, three hundred eighty-three thousand, nine hundred eighty-one".