9091939 has 2 divisors, whose sum is σ = 9091940. Its totient is φ = 9091938.

The previous prime is 9091921. The next prime is 9091961. The reversal of 9091939 is 9391909.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9091939 - 2¹¹ = 9089891 is a prime.

It is not a weakly prime, because it can be changed into another prime (9091909) 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, 4545969 + 4545970.

It is an arithmetic number, because the mean of its divisors is an integer number (4545970).

Almost surely, 2^9091939 is an apocalyptic number.

9091939 is a deficient number, since it is larger than the sum of its proper divisors (1).

9091939 is an equidigital number, since it uses as much as digits as its factorization.

9091939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19683, while the sum is 40.

The square root of 9091939 is about 3015.2842320418. The cubic root of 9091939 is about 208.7142833941.

It can be divided in two parts, 90 and 91939, that added together give a palindrome (92029).

The spelling of 9091939 in words is "nine million, ninety-one thousand, nine hundred thirty-nine".