6956921 has 4 divisors (see below), whose sum is σ = 7126644. Its totient is φ = 6787200.

The previous prime is 6956909. The next prime is 6956923. The reversal of 6956921 is 1296596.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1597696 + 5359225 = 1264^2 + 2315^2 .

It is a cyclic number.

It is not a de Polignac number, because 6956921 - 2⁶ = 6956857 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6956923) 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, 84800 + ... + 84881.

It is an arithmetic number, because the mean of its divisors is an integer number (1781661).

Almost surely, 2^6956921 is an apocalyptic number.

It is an amenable number.

6956921 is a deficient number, since it is larger than the sum of its proper divisors (169723).

6956921 is a wasteful number, since it uses less digits than its factorization.

6956921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169722.

The product of its digits is 29160, while the sum is 38.

The square root of 6956921 is about 2637.5975811333. The cubic root of 6956921 is about 190.8998954617.

The spelling of 6956921 in words is "six million, nine hundred fifty-six thousand, nine hundred twenty-one".