9090919 has 2 divisors, whose sum is σ = 9090920. Its totient is φ = 9090918.

The previous prime is 9090901. The next prime is 9090947. The reversal of 9090919 is 9190909.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9090919 - 2⁷ = 9090791 is a prime.

It is a super-2 number, since 2×9090919² = 165289616529122, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9090989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4545459 + 4545460.

It is an arithmetic number, because the mean of its divisors is an integer number (4545460).

Almost surely, 2^9090919 is an apocalyptic number.

9090919 is a deficient number, since it is larger than the sum of its proper divisors (1).

9090919 is an equidigital number, since it uses as much as digits as its factorization.

9090919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6561, while the sum is 37.

The square root of 9090919 is about 3015.1150890140. The cubic root of 9090919 is about 208.7064780723.

It can be divided in two parts, 90909 and 19, that multiplied together give a palindrome (1727271).

The spelling of 9090919 in words is "nine million, ninety thousand, nine hundred nineteen".