6947981 has 4 divisors (see below), whose sum is σ = 6968352. Its totient is φ = 6927612.

The previous prime is 6947959. The next prime is 6948041. The reversal of 6947981 is 1897496.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6947981 - 2¹⁸ = 6685837 is a prime.

It is a super-2 number, since 2×6947981² = 96548879952722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6947911) 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, 9665 + ... + 10358.

It is an arithmetic number, because the mean of its divisors is an integer number (1742088).

Almost surely, 2^6947981 is an apocalyptic number.

It is an amenable number.

6947981 is a deficient number, since it is larger than the sum of its proper divisors (20371).

6947981 is a wasteful number, since it uses less digits than its factorization.

6947981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20370.

The product of its digits is 108864, while the sum is 44.

The square root of 6947981 is about 2635.9023123022. The cubic root of 6947981 is about 190.8180883601.

The spelling of 6947981 in words is "six million, nine hundred forty-seven thousand, nine hundred eighty-one".