90610189 has 2 divisors, whose sum is σ = 90610190. Its totient is φ = 90610188.

The previous prime is 90610171. The next prime is 90610199. The reversal of 90610189 is 98101609.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48580900 + 42029289 = 6970^2 + 6483^2 .

It is an emirp because it is prime and its reverse (98101609) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90610189 - 2¹³ = 90601997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90610109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45305094 + 45305095.

It is an arithmetic number, because the mean of its divisors is an integer number (45305095).

Almost surely, 2^90610189 is an apocalyptic number.

It is an amenable number.

90610189 is a deficient number, since it is larger than the sum of its proper divisors (1).

90610189 is an equidigital number, since it uses as much as digits as its factorization.

90610189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 90610189 is about 9518.9384387126. The cubic root of 90610189 is about 449.1509736135.

The spelling of 90610189 in words is "ninety million, six hundred ten thousand, one hundred eighty-nine".