90075289 has 2 divisors, whose sum is σ = 90075290. Its totient is φ = 90075288.

The previous prime is 90075287. The next prime is 90075317. The reversal of 90075289 is 98257009.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47499664 + 42575625 = 6892^2 + 6525^2 .

It is an emirp because it is prime and its reverse (98257009) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90075289 - 2¹ = 90075287 is a prime.

It is a super-2 number, since 2×90075289² = 16227115376867042, which contains 22 as substring.

Together with 90075287, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (90075281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45037644 + 45037645.

It is an arithmetic number, because the mean of its divisors is an integer number (45037645).

Almost surely, 2^90075289 is an apocalyptic number.

It is an amenable number.

90075289 is a deficient number, since it is larger than the sum of its proper divisors (1).

90075289 is an equidigital number, since it uses as much as digits as its factorization.

90075289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 90075289 is about 9490.8002296961. The cubic root of 90075289 is about 448.2654029676.

The spelling of 90075289 in words is "ninety million, seventy-five thousand, two hundred eighty-nine".