6909939792 has 160 divisors (see below), whose sum is σ = 22841871360. Its totient is φ = 1959085440.

The previous prime is 6909939791. The next prime is 6909939793. The reversal of 6909939792 is 2979399096.

It is an interprime number because it is at equal distance from previous prime (6909939791) and next prime (6909939793).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6909939791) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 387423 + ... + 404865.

It is an arithmetic number, because the mean of its divisors is an integer number (142761696).

Almost surely, 2^6909939792 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6909939792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11420935680).

6909939792 is an abundant number, since it is smaller than the sum of its proper divisors (15931931568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6909939792 is a wasteful number, since it uses less digits than its factorization.

6909939792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17598 (or 17586 counting only the distinct ones).

The product of its (nonzero) digits is 14880348, while the sum is 63.

The square root of 6909939792 is about 83126.0476144512. The cubic root of 6909939792 is about 1904.6919856647.

The spelling of 6909939792 in words is "six billion, nine hundred nine million, nine hundred thirty-nine thousand, seven hundred ninety-two".