6920257 has 2 divisors, whose sum is σ = 6920258. Its totient is φ = 6920256.

The previous prime is 6920227. The next prime is 6920273. The reversal of 6920257 is 7520296.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4260096 + 2660161 = 2064^2 + 1631^2 .

It is a cyclic number.

It is not a de Polignac number, because 6920257 - 2⁷ = 6920129 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6920227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3460128 + 3460129.

It is an arithmetic number, because the mean of its divisors is an integer number (3460129).

Almost surely, 2^6920257 is an apocalyptic number.

It is an amenable number.

6920257 is a deficient number, since it is larger than the sum of its proper divisors (1).

6920257 is an equidigital number, since it uses as much as digits as its factorization.

6920257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 6920257 is about 2630.6381355101. The cubic root of 6920257 is about 190.5639477334.

The spelling of 6920257 in words is "six million, nine hundred twenty thousand, two hundred fifty-seven".