89491601 has 2 divisors, whose sum is σ = 89491602. Its totient is φ = 89491600.

The previous prime is 89491583. The next prime is 89491639. The reversal of 89491601 is 10619498.

It is a happy number.

It is a Cunningham number, because it is equal to 9460²+1.

It is an a-pointer prime, because the next prime (89491639) can be obtained adding 89491601 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89491600 + 1 = 9460^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 89491601 - 2¹⁸ = 89229457 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (89491681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44745800 + 44745801.

It is an arithmetic number, because the mean of its divisors is an integer number (44745801).

Almost surely, 2^89491601 is an apocalyptic number.

It is an amenable number.

89491601 is a deficient number, since it is larger than the sum of its proper divisors (1).

89491601 is an equidigital number, since it uses as much as digits as its factorization.

89491601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 89491601 is about 9460.0000528541. Note that the first 4 decimals coincide. The cubic root of 89491601 is about 447.2950504963.

The spelling of 89491601 in words is "eighty-nine million, four hundred ninety-one thousand, six hundred one".