90002089 has 2 divisors, whose sum is σ = 90002090. Its totient is φ = 90002088.

The previous prime is 90002041. The next prime is 90002117. The reversal of 90002089 is 98020009.

It is a happy number.

It is an a-pointer prime, because the next prime (90002117) can be obtained adding 90002089 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89965225 + 36864 = 9485^2 + 192^2 .

It is an emirp because it is prime and its reverse (98020009) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90002089 is a prime.

It is not a weakly prime, because it can be changed into another prime (90002189) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45001044 + 45001045.

It is an arithmetic number, because the mean of its divisors is an integer number (45001045).

Almost surely, 2^90002089 is an apocalyptic number.

It is an amenable number.

90002089 is a deficient number, since it is larger than the sum of its proper divisors (1).

90002089 is an equidigital number, since it uses as much as digits as its factorization.

90002089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 90002089 is about 9486.9430798335. The cubic root of 90002089 is about 448.1439419083.

The spelling of 90002089 in words is "ninety million, two thousand, eighty-nine".