6909091 has 4 divisors (see below), whose sum is σ = 7896112. Its totient is φ = 5922072.

The previous prime is 6909059. The next prime is 6909109. The reversal of 6909091 is 1909096.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6909091 - 2⁵ = 6909059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6909011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 493500 + ... + 493513.

It is an arithmetic number, because the mean of its divisors is an integer number (1974028).

Almost surely, 2^6909091 is an apocalyptic number.

6909091 is a deficient number, since it is larger than the sum of its proper divisors (987021).

6909091 is an equidigital number, since it uses as much as digits as its factorization.

6909091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987020.

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 6909091 is about 2628.5149799839. The cubic root of 6909091 is about 190.4613993981.

The spelling of 6909091 in words is "six million, nine hundred nine thousand, ninety-one".