9709091 has 16 divisors (see below), whose sum is σ = 11902464. Its totient is φ = 7730304.

The previous prime is 9709081. The next prime is 9709093. The reversal of 9709091 is 1909079.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 9709091 - 2⁶ = 9709027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9709093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9386 + ... + 10368.

It is an arithmetic number, because the mean of its divisors is an integer number (743904).

Almost surely, 2^9709091 is an apocalyptic number.

9709091 is a deficient number, since it is larger than the sum of its proper divisors (2193373).

9709091 is a wasteful number, since it uses less digits than its factorization.

9709091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090.

The product of its (nonzero) digits is 5103, while the sum is 35.

The square root of 9709091 is about 3115.9414307718. The cubic root of 9709091 is about 213.3337285691. Note that the first 3 decimals are identical.

The spelling of 9709091 in words is "nine million, seven hundred nine thousand, ninety-one".