90507089 has 4 divisors (see below), whose sum is σ = 95270640. Its totient is φ = 85743540.

The previous prime is 90507083. The next prime is 90507091. The reversal of 90507089 is 98070509.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98070509 = 6737 ⋅14557.

It is a cyclic number.

It is not a de Polignac number, because 90507089 - 2¹⁶ = 90441553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90507083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2381747 + ... + 2381784.

It is an arithmetic number, because the mean of its divisors is an integer number (23817660).

Almost surely, 2^90507089 is an apocalyptic number.

It is an amenable number.

90507089 is a deficient number, since it is larger than the sum of its proper divisors (4763551).

90507089 is a wasteful number, since it uses less digits than its factorization.

90507089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4763550.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 90507089 is about 9513.5213774921. The cubic root of 90507089 is about 448.9805548099.

The spelling of 90507089 in words is "ninety million, five hundred seven thousand, eighty-nine".