90474447409 has 4 divisors (see below), whose sum is σ = 90503439460. Its totient is φ = 90445455360.

The previous prime is 90474447397. The next prime is 90474447461.

90474447409 is nontrivially palindromic in base 10.

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 35542806784 + 54931640625 = 188528^2 + 234375^2 .

It is a cyclic number.

It is not a de Polignac number, because 90474447409 - 2¹³ = 90474439217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90474445409) 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, 14491344 + ... + 14497585.

It is an arithmetic number, because the mean of its divisors is an integer number (22625859865).

Almost surely, 2^90474447409 is an apocalyptic number.

It is an amenable number.

90474447409 is a deficient number, since it is larger than the sum of its proper divisors (28992051).

90474447409 is a wasteful number, since it uses less digits than its factorization.

90474447409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28992050.

The product of its (nonzero) digits is 4064256, while the sum is 52.

The spelling of 90474447409 in words is "ninety billion, four hundred seventy-four million, four hundred forty-seven thousand, four hundred nine".