9090857 has 2 divisors, whose sum is σ = 9090858. Its totient is φ = 9090856.

The previous prime is 9090853. The next prime is 9090859. The reversal of 9090857 is 7580909.

9090857 is digitally balanced in base 2, 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., 6255001 + 2835856 = 2501^2 + 1684^2 .

It is a cyclic number.

It is not a de Polignac number, because 9090857 - 2² = 9090853 is a prime.

Together with 9090859, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9090857.

It is not a weakly prime, because it can be changed into another prime (9090853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4545428 + 4545429.

It is an arithmetic number, because the mean of its divisors is an integer number (4545429).

Almost surely, 2^9090857 is an apocalyptic number.

It is an amenable number.

9090857 is a deficient number, since it is larger than the sum of its proper divisors (1).

9090857 is an equidigital number, since it uses as much as digits as its factorization.

9090857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 9090857 is about 3015.1048074652. The cubic root of 9090857 is about 208.7060036123.

The spelling of 9090857 in words is "nine million, ninety thousand, eight hundred fifty-seven".