6937390681 has 27 divisors (see below), whose sum is σ = 7742811069. Its totient is φ = 6212842272.

The previous prime is 6937390667. The next prime is 6937390699. The reversal of 6937390681 is 1860937396.

The square root of 6937390681 is 83291.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 3754625625 + 3182765056 = 61275^2 + 56416^2 .

It is not a de Polignac number, because 6937390681 - 2⁷ = 6937390553 is a prime.

It is a super-2 number, since 2×6937390681² = 96254778921651287522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6937390631) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 46559595 + ... + 46559743.

Almost surely, 2^6937390681 is an apocalyptic number.

6937390681 is the 83291-st square number.

6937390681 is the 41646-th centered octagonal number.

It is an amenable number.

6937390681 is a deficient number, since it is larger than the sum of its proper divisors (805420388).

6937390681 is an equidigital number, since it uses as much as digits as its factorization.

6937390681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 52.

The cubic root of 6937390681 is about 1907.2108886097.

The spelling of 6937390681 in words is "six billion, nine hundred thirty-seven million, three hundred ninety thousand, six hundred eighty-one".