6921294617 has 4 divisors (see below), whose sum is σ = 6925571280. Its totient is φ = 6917017956.

The previous prime is 6921294581. The next prime is 6921294649. The reversal of 6921294617 is 7164921296.

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 6921294617 - 2²² = 6917100313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6921294697) 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, 2135903 + ... + 2139140.

It is an arithmetic number, because the mean of its divisors is an integer number (1731392820).

Almost surely, 2^6921294617 is an apocalyptic number.

It is an amenable number.

6921294617 is a deficient number, since it is larger than the sum of its proper divisors (4276663).

6921294617 is a wasteful number, since it uses less digits than its factorization.

6921294617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4276662.

The product of its digits is 326592, while the sum is 47.

The square root of 6921294617 is about 83194.3184177862. The cubic root of 6921294617 is about 1905.7347158538.

The spelling of 6921294617 in words is "six billion, nine hundred twenty-one million, two hundred ninety-four thousand, six hundred seventeen".