90166539 has 16 divisors (see below), whose sum is σ = 127019520. Its totient is φ = 56800800.

The previous prime is 90166537. The next prime is 90166541. The reversal of 90166539 is 93566109.

It is an interprime number because it is at equal distance from previous prime (90166537) and next prime (90166541).

It is not a de Polignac number, because 90166539 - 2¹ = 90166537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90166497 and 90166506.

It is not an unprimeable number, because it can be changed into a prime (90166537) 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, 6937 + ... + 15114.

It is an arithmetic number, because the mean of its divisors is an integer number (7938720).

Almost surely, 2^90166539 is an apocalyptic number.

90166539 is a deficient number, since it is larger than the sum of its proper divisors (36852981).

90166539 is a wasteful number, since it uses less digits than its factorization.

90166539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22130.

The product of its (nonzero) digits is 43740, while the sum is 39.

The square root of 90166539 is about 9495.6062997578. The cubic root of 90166539 is about 448.4167223572.

The spelling of 90166539 in words is "ninety million, one hundred sixty-six thousand, five hundred thirty-nine".