6961391 has 16 divisors (see below), whose sum is σ = 7741440. Its totient is φ = 6233760.

The previous prime is 6961379. The next prime is 6961393. The reversal of 6961391 is 1931696.

It is a cyclic number.

It is not a de Polignac number, because 6961391 - 2⁶ = 6961327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6961393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31106 + ... + 31328.

It is an arithmetic number, because the mean of its divisors is an integer number (483840).

Almost surely, 2^6961391 is an apocalyptic number.

6961391 is a deficient number, since it is larger than the sum of its proper divisors (780049).

6961391 is a wasteful number, since it uses less digits than its factorization.

6961391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326.

The product of its digits is 8748, while the sum is 35.

The square root of 6961391 is about 2638.4448070786. Note that the first 3 decimals coincide. The cubic root of 6961391 is about 190.9407727328.

It can be divided in two parts, 696 and 1391, that multiplied together give a triangular number (968136 = T₁₃₉₁).

The spelling of 6961391 in words is "six million, nine hundred sixty-one thousand, three hundred ninety-one".