6840629069 has 8 divisors (see below), whose sum is σ = 7210033560. Its totient is φ = 6480126016.

The previous prime is 6840629057. The next prime is 6840629083. The reversal of 6840629069 is 9609260486.

It can be written as a sum of positive squares in 4 ways, for example, as 2675475625 + 4165153444 = 51725^2 + 64538^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6840629069 is a prime.

It is a super-2 number, since 2×6840629069² = 93588412119295613522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6840629009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2223782 + ... + 2226855.

It is an arithmetic number, because the mean of its divisors is an integer number (901254195).

Almost surely, 2^6840629069 is an apocalyptic number.

It is an amenable number.

6840629069 is a deficient number, since it is larger than the sum of its proper divisors (369404491).

6840629069 is a wasteful number, since it uses less digits than its factorization.

6840629069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4450719.

The product of its (nonzero) digits is 1119744, while the sum is 50.

The square root of 6840629069 is about 82708.0955469294. The cubic root of 6840629069 is about 1898.3021831187.

The spelling of 6840629069 in words is "six billion, eight hundred forty million, six hundred twenty-nine thousand, sixty-nine".