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1311006247 is a prime number
BaseRepresentation
bin100111000100100…
…0101111000100111
310101100220000110221
41032021011320213
510141104144442
6334031225211
744326240435
oct11611057047
93340800427
101311006247
11613035441
12307078207
1317b7bc855
14c6187d55
157a166467
hex4e245e27

1311006247 has 2 divisors, whose sum is σ = 1311006248. Its totient is φ = 1311006246.

The previous prime is 1311006181. The next prime is 1311006259. The reversal of 1311006247 is 7426001131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-1311006247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311003247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655503123 + 655503124.

It is an arithmetic number, because the mean of its divisors is an integer number (655503124).

Almost surely, 21311006247 is an apocalyptic number.

1311006247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311006247 is an equidigital number, since it uses as much as digits as its factorization.

1311006247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 1311006247 is about 36207.8202464606. The cubic root of 1311006247 is about 1094.4642673082.

Adding to 1311006247 its reverse (7426001131), we get a palindrome (8737007378).

The spelling of 1311006247 in words is "one billion, three hundred eleven million, six thousand, two hundred forty-seven".