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318749 is a prime number
BaseRepresentation
bin1001101110100011101
3121012020112
41031310131
540144444
610455405
72465204
oct1156435
9535215
10318749
111a8532
12134565
13b2112
148423b
156469e
hex4dd1d

318749 has 2 divisors, whose sum is σ = 318750. Its totient is φ = 318748.

The previous prime is 318743. The next prime is 318751. The reversal of 318749 is 947813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196249 + 122500 = 443^2 + 350^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-318749 is a prime.

It is a Sophie Germain prime.

Together with 318751, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318743) 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, 159374 + 159375.

It is an arithmetic number, because the mean of its divisors is an integer number (159375).

2318749 is an apocalyptic number.

It is an amenable number.

318749 is a deficient number, since it is larger than the sum of its proper divisors (1).

318749 is an equidigital number, since it uses as much as digits as its factorization.

318749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 32.

The square root of 318749 is about 564.5786039162. The cubic root of 318749 is about 68.3097889671.

The spelling of 318749 in words is "three hundred eighteen thousand, seven hundred forty-nine".