6941991 has 16 divisors (see below), whose sum is σ = 10944000. Its totient is φ = 3829728.

The previous prime is 6941981. The next prime is 6942031. The reversal of 6941991 is 1991496.

It is not a de Polignac number, because 6941991 - 2¹¹ = 6939943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6941941) 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, 5091 + ... + 6308.

It is an arithmetic number, because the mean of its divisors is an integer number (684000).

Almost surely, 2^6941991 is an apocalyptic number.

6941991 is a deficient number, since it is larger than the sum of its proper divisors (4002009).

6941991 is a wasteful number, since it uses less digits than its factorization.

6941991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11438.

The product of its digits is 17496, while the sum is 39.

The square root of 6941991 is about 2634.7658339974. The cubic root of 6941991 is about 190.7632365034.

The spelling of 6941991 in words is "six million, nine hundred forty-one thousand, nine hundred ninety-one".