90571605 has 16 divisors (see below), whose sum is σ = 147079104. Its totient is φ = 47583360.

The previous prime is 90571601. The next prime is 90571721. The reversal of 90571605 is 50617509.

It is not a de Polignac number, because 90571605 - 2² = 90571601 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90571601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44056 + ... + 46065.

It is an arithmetic number, because the mean of its divisors is an integer number (9192444).

Almost surely, 2^90571605 is an apocalyptic number.

It is an amenable number.

90571605 is a deficient number, since it is larger than the sum of its proper divisors (56507499).

90571605 is a wasteful number, since it uses less digits than its factorization.

90571605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90196.

The product of its (nonzero) digits is 9450, while the sum is 33.

The square root of 90571605 is about 9516.9115263304. The cubic root of 90571605 is about 449.0872114627.

The spelling of 90571605 in words is "ninety million, five hundred seventy-one thousand, six hundred five".