6890243 has 2 divisors, whose sum is σ = 6890244. Its totient is φ = 6890242.

The previous prime is 6890239. The next prime is 6890249. The reversal of 6890243 is 3420986.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6890243 - 2² = 6890239 is a prime.

It is equal to p₄₆₉₆₇₀ and since 6890243 and 469670 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (6890249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3445121 + 3445122.

It is an arithmetic number, because the mean of its divisors is an integer number (3445122).

Almost surely, 2^6890243 is an apocalyptic number.

6890243 is a deficient number, since it is larger than the sum of its proper divisors (1).

6890243 is an equidigital number, since it uses as much as digits as its factorization.

6890243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 6890243 is about 2624.9272370868. The cubic root of 6890243 is about 190.2880487720.

The spelling of 6890243 in words is "six million, eight hundred ninety thousand, two hundred forty-three".