90605539 has 4 divisors (see below), whose sum is σ = 91697256. Its totient is φ = 89513824.

The previous prime is 90605527. The next prime is 90605561. The reversal of 90605539 is 93550609.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90605539 - 2²⁵ = 57051107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90605498 and 90605507.

It is not an unprimeable number, because it can be changed into a prime (90600539) 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, 545734 + ... + 545899.

It is an arithmetic number, because the mean of its divisors is an integer number (22924314).

Almost surely, 2^90605539 is an apocalyptic number.

90605539 is a deficient number, since it is larger than the sum of its proper divisors (1091717).

90605539 is a wasteful number, since it uses less digits than its factorization.

90605539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091716.

The product of its (nonzero) digits is 36450, while the sum is 37.

The square root of 90605539 is about 9518.6941856538. The cubic root of 90605539 is about 449.1432901959.

The spelling of 90605539 in words is "ninety million, six hundred five thousand, five hundred thirty-nine".