6797781 has 6 divisors (see below), whose sum is σ = 9819030. Its totient is φ = 4531848.

The previous prime is 6797767. The next prime is 6797809. The reversal of 6797781 is 1877976.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 5336100 + 1461681 = 2310^2 + 1209^2 .

It is not a de Polignac number, because 6797781 - 2²¹ = 4700629 is a prime.

It is a super-2 number, since 2×6797781² = 92419653047922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6797701) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 377646 + ... + 377663.

It is an arithmetic number, because the mean of its divisors is an integer number (1636505).

Almost surely, 2^6797781 is an apocalyptic number.

It is an amenable number.

6797781 is a deficient number, since it is larger than the sum of its proper divisors (3021249).

6797781 is a wasteful number, since it uses less digits than its factorization.

6797781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755315 (or 755312 counting only the distinct ones).

The product of its digits is 148176, while the sum is 45.

The square root of 6797781 is about 2607.2554535373. The cubic root of 6797781 is about 189.4330374675.

The spelling of 6797781 in words is "six million, seven hundred ninety-seven thousand, seven hundred eighty-one".