6243409 has 2 divisors, whose sum is σ = 6243410. Its totient is φ = 6243408.

The previous prime is 6243407. The next prime is 6243443. The reversal of 6243409 is 9043426.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3504384 + 2739025 = 1872^2 + 1655^2 .

It is a cyclic number.

It is not a de Polignac number, because 6243409 - 2¹ = 6243407 is a prime.

Together with 6243407, it forms a pair of twin primes.

6243409 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (6243407) 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, 3121704 + 3121705.

It is an arithmetic number, because the mean of its divisors is an integer number (3121705).

Almost surely, 2^6243409 is an apocalyptic number.

It is an amenable number.

6243409 is a deficient number, since it is larger than the sum of its proper divisors (1).

6243409 is an equidigital number, since it uses as much as digits as its factorization.

6243409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 6243409 is about 2498.6814522864. The cubic root of 6243409 is about 184.1368016199.

The spelling of 6243409 in words is "six million, two hundred forty-three thousand, four hundred nine".