Search a number
-
+
6949 is a prime number
BaseRepresentation
bin1101100100101
3100112101
41230211
5210244
652101
726155
oct15445
910471
106949
115248
124031
133217
142765
1520d4
hex1b25

6949 has 2 divisors, whose sum is σ = 6950. Its totient is φ = 6948.

The previous prime is 6947. The next prime is 6959. The reversal of 6949 is 9496.

Subtracting from 6949 its product of digits (1944), we obtain a palindrome (5005).

It can be divided in two parts, 694 and 9, that added together give a triangular number (703 = T37).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6724 + 225 = 82^2 + 15^2 .

It is a cyclic number.

It is not a de Polignac number, because 6949 - 21 = 6947 is a prime.

Together with 6947, it forms a pair of twin primes.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3474 + 3475.

It is an arithmetic number, because the mean of its divisors is an integer number (3475).

26949 is an apocalyptic number.

It is an amenable number.

6949 is a deficient number, since it is larger than the sum of its proper divisors (1).

6949 is an equidigital number, since it uses as much as digits as its factorization.

6949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 28.

The square root of 6949 is about 83.3606621855. The cubic root of 6949 is about 19.0827416448.

The spelling of 6949 in words is "six thousand, nine hundred forty-nine".