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981311 is a prime number
BaseRepresentation
bin11101111100100111111
31211212002212
43233210333
5222400221
633011035
711224652
oct3574477
91755085
10981311
11610301
123b3a7b
13284876
141b7899
15145b5b
hexef93f

981311 has 2 divisors, whose sum is σ = 981312. Its totient is φ = 981310.

The previous prime is 981301. The next prime is 981319. The reversal of 981311 is 113189.

It is a strong prime.

It is an emirp because it is prime and its reverse (113189) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 981311 - 214 = 964927 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (981319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490655 + 490656.

It is an arithmetic number, because the mean of its divisors is an integer number (490656).

2981311 is an apocalyptic number.

981311 is a deficient number, since it is larger than the sum of its proper divisors (1).

981311 is an equidigital number, since it uses as much as digits as its factorization.

981311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 23.

The square root of 981311 is about 990.6114273518. The cubic root of 981311 is about 99.3731116554.

The spelling of 981311 in words is "nine hundred eighty-one thousand, three hundred eleven".