6781634 has 8 divisors (see below), whose sum is σ = 10225740. Its totient is φ = 3373056.

The previous prime is 6781633. The next prime is 6781661. The reversal of 6781634 is 4361876.

It can be written as a sum of positive squares in 2 ways, for example, as 5452225 + 1329409 = 2335^2 + 1153^2 .

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

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 6781594 and 6781603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6781633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8399 + ... + 9170.

Almost surely, 2^6781634 is an apocalyptic number.

6781634 is a deficient number, since it is larger than the sum of its proper divisors (3444106).

6781634 is a wasteful number, since it uses less digits than its factorization.

6781634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17764.

The product of its digits is 24192, while the sum is 35.

The square root of 6781634 is about 2604.1570613156. The cubic root of 6781634 is about 189.2829296442.

The spelling of 6781634 in words is "six million, seven hundred eighty-one thousand, six hundred thirty-four".