6937981 has 4 divisors (see below), whose sum is σ = 7125532. Its totient is φ = 6750432.

The previous prime is 6937969. The next prime is 6938003. The reversal of 6937981 is 1897396.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6200100 + 737881 = 2490^2 + 859^2 .

It is a cyclic number.

It is not a de Polignac number, because 6937981 - 2⁵ = 6937949 is a prime.

It is a super-2 number, since 2×6937981² = 96271160712722, 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 (6937951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93720 + ... + 93793.

It is an arithmetic number, because the mean of its divisors is an integer number (1781383).

Almost surely, 2^6937981 is an apocalyptic number.

It is an amenable number.

6937981 is a deficient number, since it is larger than the sum of its proper divisors (187551).

6937981 is a wasteful number, since it uses less digits than its factorization.

6937981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187550.

The product of its digits is 81648, while the sum is 43.

The square root of 6937981 is about 2634.0047456297. The cubic root of 6937981 is about 190.7264983439.

The spelling of 6937981 in words is "six million, nine hundred thirty-seven thousand, nine hundred eighty-one".