6931656409 has 4 divisors (see below), whose sum is σ = 6932658304. Its totient is φ = 6930654516.

The previous prime is 6931656341. The next prime is 6931656419. The reversal of 6931656409 is 9046561396.

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 6931656409 - 2⁹ = 6931655897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6931656419) 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, 490497 + ... + 504430.

It is an arithmetic number, because the mean of its divisors is an integer number (1733164576).

Almost surely, 2^6931656409 is an apocalyptic number.

It is an amenable number.

6931656409 is a deficient number, since it is larger than the sum of its proper divisors (1001895).

6931656409 is an equidigital number, since it uses as much as digits as its factorization.

6931656409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001894.

The product of its (nonzero) digits is 1049760, while the sum is 49.

The square root of 6931656409 is about 83256.5697647939. The cubic root of 6931656409 is about 1906.6852596351.

The spelling of 6931656409 in words is "six billion, nine hundred thirty-one million, six hundred fifty-six thousand, four hundred nine".