6917972709 has 4 divisors (see below), whose sum is σ = 9223963616. Its totient is φ = 4611981804.

The previous prime is 6917972701. The next prime is 6917972749. The reversal of 6917972709 is 9072797196.

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 not a de Polignac number, because 6917972709 - 2³ = 6917972701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6917972701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1152995449 + ... + 1152995454.

It is an arithmetic number, because the mean of its divisors is an integer number (2305990904).

Almost surely, 2^6917972709 is an apocalyptic number.

It is an amenable number.

6917972709 is a deficient number, since it is larger than the sum of its proper divisors (2305990907).

6917972709 is a wasteful number, since it uses less digits than its factorization.

6917972709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2305990906.

The product of its (nonzero) digits is 3000564, while the sum is 57.

The square root of 6917972709 is about 83174.3512688858. The cubic root of 6917972709 is about 1905.4297782744.

The spelling of 6917972709 in words is "six billion, nine hundred seventeen million, nine hundred seventy-two thousand, seven hundred nine".