90240099 has 4 divisors (see below), whose sum is σ = 120320136. Its totient is φ = 60160064.

The previous prime is 90240061. The next prime is 90240103. The reversal of 90240099 is 99004209.

It is a happy number.

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 90240099 - 2²¹ = 88142947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90240499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15040014 + ... + 15040019.

It is an arithmetic number, because the mean of its divisors is an integer number (30080034).

Almost surely, 2^90240099 is an apocalyptic number.

90240099 is a deficient number, since it is larger than the sum of its proper divisors (30080037).

90240099 is a wasteful number, since it uses less digits than its factorization.

90240099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30080036.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 90240099 is about 9499.4788804439. The cubic root of 90240099 is about 448.5386322083.

The spelling of 90240099 in words is "ninety million, two hundred forty thousand, ninety-nine".