6971631 has 4 divisors (see below), whose sum is σ = 9295512. Its totient is φ = 4647752.

The previous prime is 6971611. The next prime is 6971641. The reversal of 6971631 is 1361796.

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

It is a cyclic number.

It is not a de Polignac number, because 6971631 - 2¹⁸ = 6709487 is a prime.

It is a super-2 number, since 2×6971631² = 97207277600322, which contains 22 as substring.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 6971592 and 6971601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6971611) 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, 1161936 + ... + 1161941.

It is an arithmetic number, because the mean of its divisors is an integer number (2323878).

Almost surely, 2^6971631 is an apocalyptic number.

6971631 is a deficient number, since it is larger than the sum of its proper divisors (2323881).

6971631 is a wasteful number, since it uses less digits than its factorization.

6971631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2323880.

The product of its digits is 6804, while the sum is 33.

The square root of 6971631 is about 2640.3846310718. The cubic root of 6971631 is about 191.0343496055.

The spelling of 6971631 in words is "six million, nine hundred seventy-one thousand, six hundred thirty-one".