89813813 has 2 divisors, whose sum is σ = 89813814. Its totient is φ = 89813812.

The previous prime is 89813809. The next prime is 89813831. The reversal of 89813813 is 31831898.

It is a happy number.

Together with next prime (89813831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47914084 + 41899729 = 6922^2 + 6473^2 .

It is a cyclic number.

It is not a de Polignac number, because 89813813 - 2² = 89813809 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89813833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44906906 + 44906907.

It is an arithmetic number, because the mean of its divisors is an integer number (44906907).

Almost surely, 2^89813813 is an apocalyptic number.

It is an amenable number.

89813813 is a deficient number, since it is larger than the sum of its proper divisors (1).

89813813 is an equidigital number, since it uses as much as digits as its factorization.

89813813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 41.

The square root of 89813813 is about 9477.0149836328. The cubic root of 89813813 is about 447.8312319371.

The spelling of 89813813 in words is "eighty-nine million, eight hundred thirteen thousand, eight hundred thirteen".