89807021 has 2 divisors, whose sum is σ = 89807022. Its totient is φ = 89807020.

The previous prime is 89806979. The next prime is 89807057. The reversal of 89807021 is 12070898.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79477225 + 10329796 = 8915^2 + 3214^2 .

It is a cyclic number.

It is not a de Polignac number, because 89807021 - 2⁶ = 89806957 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89807071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44903510 + 44903511.

It is an arithmetic number, because the mean of its divisors is an integer number (44903511).

Almost surely, 2^89807021 is an apocalyptic number.

It is an amenable number.

89807021 is a deficient number, since it is larger than the sum of its proper divisors (1).

89807021 is an equidigital number, since it uses as much as digits as its factorization.

89807021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 89807021 is about 9476.6566361771. The cubic root of 89807021 is about 447.8199428555.

The spelling of 89807021 in words is "eighty-nine million, eight hundred seven thousand, twenty-one".