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6805049 = 17400297
BaseRepresentation
bin11001111101011000111001
3110210201202212
4121331120321
53220230144
6401504505
7111561536
oct31753071
913721685
106805049
113928809
122342135
131543574
14c91d8d
158e649e
hex67d639

6805049 has 4 divisors (see below), whose sum is σ = 7205364. Its totient is φ = 6404736.

The previous prime is 6805037. The next prime is 6805061. The reversal of 6805049 is 9405086.

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

It is an interprime number because it is at equal distance from previous prime (6805037) and next prime (6805061).

It can be written as a sum of positive squares in 2 ways, for example, as 3168400 + 3636649 = 1780^2 + 1907^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-6805049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6805069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200132 + ... + 200165.

It is an arithmetic number, because the mean of its divisors is an integer number (1801341).

Almost surely, 26805049 is an apocalyptic number.

It is an amenable number.

6805049 is a deficient number, since it is larger than the sum of its proper divisors (400315).

6805049 is a wasteful number, since it uses less digits than its factorization.

6805049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400314.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 6805049 is about 2608.6488840011. The cubic root of 6805049 is about 189.5005256145.

The spelling of 6805049 in words is "six million, eight hundred five thousand, forty-nine".

Divisors: 1 17 400297 6805049