90032428009 has 4 divisors (see below), whose sum is σ = 95328453204. Its totient is φ = 84736402816.

The previous prime is 90032427929. The next prime is 90032428081. The reversal of 90032428009 is 90082423009.

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

It can be written as a sum of positive squares in 2 ways, for example, as 76349979225 + 13682448784 = 276315^2 + 116972^2 .

It is a cyclic number.

It is not a de Polignac number, because 90032428009 - 2⁹ = 90032427497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90032428099) 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, 2648012572 + ... + 2648012605.

It is an arithmetic number, because the mean of its divisors is an integer number (23832113301).

Almost surely, 2^90032428009 is an apocalyptic number.

It is an amenable number.

90032428009 is a deficient number, since it is larger than the sum of its proper divisors (5296025195).

90032428009 is a wasteful number, since it uses less digits than its factorization.

90032428009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5296025194.

The product of its (nonzero) digits is 31104, while the sum is 37.

Subtracting 90032428009 from its reverse (90082423009), we obtain a triangular number (49995000 = T₉₉₉₉).

The spelling of 90032428009 in words is "ninety billion, thirty-two million, four hundred twenty-eight thousand, nine".