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311279 is a prime number
BaseRepresentation
bin1001011111111101111
3120210222212
41023333233
534430104
610401035
72434343
oct1137757
9523885
10311279
111a2961
1213017b
13ab8b7
1481623
156236e
hex4bfef

311279 has 2 divisors, whose sum is σ = 311280. Its totient is φ = 311278.

The previous prime is 311237. The next prime is 311291. The reversal of 311279 is 972113.

It is a strong prime.

It is an emirp because it is prime and its reverse (972113) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-311279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155639 + 155640.

It is an arithmetic number, because the mean of its divisors is an integer number (155640).

2311279 is an apocalyptic number.

311279 is a deficient number, since it is larger than the sum of its proper divisors (1).

311279 is an equidigital number, since it uses as much as digits as its factorization.

311279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 378, while the sum is 23.

The square root of 311279 is about 557.9238299266. The cubic root of 311279 is about 67.7719436188.

The spelling of 311279 in words is "three hundred eleven thousand, two hundred seventy-nine".