6906993809 has 4 divisors (see below), whose sum is σ = 7067621616. Its totient is φ = 6746366004.

The previous prime is 6906993799. The next prime is 6906993811. The reversal of 6906993809 is 9083996096.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6906993809 - 2³² = 2612026513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6906993839) 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, 80313839 + ... + 80313924.

It is an arithmetic number, because the mean of its divisors is an integer number (1766905404).

Almost surely, 2^6906993809 is an apocalyptic number.

It is an amenable number.

6906993809 is a deficient number, since it is larger than the sum of its proper divisors (160627807).

6906993809 is a wasteful number, since it uses less digits than its factorization.

6906993809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160627806.

The product of its (nonzero) digits is 5668704, while the sum is 59.

The square root of 6906993809 is about 83108.3257501918. The cubic root of 6906993809 is about 1904.4212651282.

The spelling of 6906993809 in words is "six billion, nine hundred six million, nine hundred ninety-three thousand, eight hundred nine".