6922921 has 2 divisors, whose sum is σ = 6922922. Its totient is φ = 6922920.

The previous prime is 6922907. The next prime is 6922933. The reversal of 6922921 is 1292296.

6922921 = 1860² + 1861².

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3463321 + 3459600 = 1861^2 + 1860^2 .

It is a cyclic number.

It is not a de Polignac number, because 6922921 - 2¹³ = 6914729 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6922901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3461460 + 3461461.

It is an arithmetic number, because the mean of its divisors is an integer number (3461461).

Almost surely, 2^6922921 is an apocalyptic number.

6922921 is the 1861-st centered square number.

It is an amenable number.

6922921 is a deficient number, since it is larger than the sum of its proper divisors (1).

6922921 is an equidigital number, since it uses as much as digits as its factorization.

6922921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 31.

The square root of 6922921 is about 2631.1444278108. The cubic root of 6922921 is about 190.5883975589.

The spelling of 6922921 in words is "six million, nine hundred twenty-two thousand, nine hundred twenty-one".