9090001 has 4 divisors (see below), whose sum is σ = 9140404. Its totient is φ = 9039600.

The previous prime is 9089989. The next prime is 9090007. The reversal of 9090001 is 1000909.

9090001 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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 540225 + 8549776 = 735^2 + 2924^2 .

It is a cyclic number.

It is not a de Polignac number, because 9090001 - 2²¹ = 6992849 is a prime.

It is a Duffinian number.

9090001 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9090007) 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, 24930 + ... + 25291.

It is an arithmetic number, because the mean of its divisors is an integer number (2285101).

Almost surely, 2^9090001 is an apocalyptic number.

It is an amenable number.

9090001 is a deficient number, since it is larger than the sum of its proper divisors (50403).

9090001 is a wasteful number, since it uses less digits than its factorization.

9090001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50402.

The product of its (nonzero) digits is 81, while the sum is 19.

The square root of 9090001 is about 3014.9628521758. The cubic root of 9090001 is about 208.6994527834.

The spelling of 9090001 in words is "nine million, ninety thousand, one".