9090901 has 2 divisors, whose sum is σ = 9090902. Its totient is φ = 9090900.

The previous prime is 9090871. The next prime is 9090919. The reversal of 9090901 is 1090909.

9090901 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9090225 + 676 = 3015^2 + 26^2 .

It is an emirp because it is prime and its reverse (1090909) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9090901 - 2¹⁷ = 8959829 is a prime.

It is an alternating number because its digits alternate between odd and even.

9090901 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 9090901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9090701) 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 as a sum of consecutive naturals, namely, 4545450 + 4545451.

It is an arithmetic number, because the mean of its divisors is an integer number (4545451).

Almost surely, 2^9090901 is an apocalyptic number.

It is an amenable number.

9090901 is a deficient number, since it is larger than the sum of its proper divisors (1).

9090901 is an equidigital number, since it uses as much as digits as its factorization.

9090901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 729, while the sum is 28.

The square root of 9090901 is about 3015.1121040519. The cubic root of 9090901 is about 208.7063403261.

The spelling of 9090901 in words is "nine million, ninety thousand, nine hundred one".