6946991 has 2 divisors, whose sum is σ = 6946992. Its totient is φ = 6946990.

The previous prime is 6946987. The next prime is 6946993. The reversal of 6946991 is 1996496.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6946991 - 2² = 6946987 is a prime.

Together with 6946993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6946993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3473495 + 3473496.

It is an arithmetic number, because the mean of its divisors is an integer number (3473496).

Almost surely, 2^6946991 is an apocalyptic number.

6946991 is a deficient number, since it is larger than the sum of its proper divisors (1).

6946991 is an equidigital number, since it uses as much as digits as its factorization.

6946991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104976, while the sum is 44.

The square root of 6946991 is about 2635.7145141308. The cubic root of 6946991 is about 190.8090248695.

The spelling of 6946991 in words is "six million, nine hundred forty-six thousand, nine hundred ninety-one".