90424165 has 16 divisors (see below), whose sum is σ = 117332208. Its totient is φ = 66502656.

The previous prime is 90424163. The next prime is 90424199. The reversal of 90424165 is 56142409.

90424165 is nontrivially palindromic in base 16.

It can be written as a sum of positive squares in 8 ways, for example, as 667489 + 89756676 = 817^2 + 9474^2 .

It is a cyclic number.

It is not a de Polignac number, because 90424165 - 2¹ = 90424163 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90424163) 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, 13999 + ... + 19411.

It is an arithmetic number, because the mean of its divisors is an integer number (7333263).

Almost surely, 2^90424165 is an apocalyptic number.

It is an amenable number.

90424165 is a deficient number, since it is larger than the sum of its proper divisors (26908043).

90424165 is a wasteful number, since it uses less digits than its factorization.

90424165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5688.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 90424165 is about 9509.1621607795. The cubic root of 90424165 is about 448.8433919263.

The spelling of 90424165 in words is "ninety million, four hundred twenty-four thousand, one hundred sixty-five".