89181361 has 2 divisors, whose sum is σ = 89181362. Its totient is φ = 89181360.

The previous prime is 89181349. The next prime is 89181401. The reversal of 89181361 is 16318198.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66912400 + 22268961 = 8180^2 + 4719^2 .

It is a cyclic number.

It is not a de Polignac number, because 89181361 - 2¹⁹ = 88657073 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 89181361.

It is not a weakly prime, because it can be changed into another prime (89181311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44590680 + 44590681.

It is an arithmetic number, because the mean of its divisors is an integer number (44590681).

Almost surely, 2^89181361 is an apocalyptic number.

It is an amenable number.

89181361 is a deficient number, since it is larger than the sum of its proper divisors (1).

89181361 is an equidigital number, since it uses as much as digits as its factorization.

89181361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 37.

The square root of 89181361 is about 9443.5883540104. The cubic root of 89181361 is about 446.7775736947. Note that the first 3 decimals are identical.

The spelling of 89181361 in words is "eighty-nine million, one hundred eighty-one thousand, three hundred sixty-one".