6219090909 has 24 divisors (see below), whose sum is σ = 9528400440. Its totient is φ = 3895262208.

The previous prime is 6219090797. The next prime is 6219090923. The reversal of 6219090909 is 9090909126.

It is a happy number.

6219090909 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1429066809 + 4790024100 = 37803^2 + 69210^2 .

It is not a de Polignac number, because 6219090909 - 2¹² = 6219086813 is a prime.

6219090909 is a modest number, since divided by 90909 gives 6219 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6219090949) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51339 + ... + 122775.

It is an arithmetic number, because the mean of its divisors is an integer number (397016685).

Almost surely, 2^6219090909 is an apocalyptic number.

It is an amenable number.

6219090909 is a deficient number, since it is larger than the sum of its proper divisors (3309309531).

6219090909 is a wasteful number, since it uses less digits than its factorization.

6219090909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72029 (or 72026 counting only the distinct ones).

The product of its (nonzero) digits is 78732, while the sum is 45.

The square root of 6219090909 is about 78861.2129566874. The cubic root of 6219090909 is about 1838.9741947773.

The spelling of 6219090909 in words is "six billion, two hundred nineteen million, ninety thousand, nine hundred nine".