90390617 has 4 divisors (see below), whose sum is σ = 90438096. Its totient is φ = 90343140.

The previous prime is 90390611. The next prime is 90390647. The reversal of 90390617 is 71609309.

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: 71609309 = 19 ⋅3768911.

It is a cyclic number.

It is not a de Polignac number, because 90390617 - 2²⁴ = 73613401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90390611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20759 + ... + 24732.

It is an arithmetic number, because the mean of its divisors is an integer number (22609524).

Almost surely, 2^90390617 is an apocalyptic number.

It is an amenable number.

90390617 is a deficient number, since it is larger than the sum of its proper divisors (47479).

90390617 is a wasteful number, since it uses less digits than its factorization.

90390617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47478.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 90390617 is about 9507.3980141782. The cubic root of 90390617 is about 448.7878770438.

The spelling of 90390617 in words is "ninety million, three hundred ninety thousand, six hundred seventeen".