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12888311 is a prime number
BaseRepresentation
bin110001001010…
…100011110111
3220020210102212
4301022203313
511244411221
61140124035
7214356152
oct61124367
926223385
1012888311
1173031a7
12439661b
132893427
1419d6c99
1511e8b5b
hexc4a8f7

12888311 has 2 divisors, whose sum is σ = 12888312. Its totient is φ = 12888310.

The previous prime is 12888301. The next prime is 12888313. The reversal of 12888311 is 11388821.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (11388821) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-12888311 is a prime.

It is a super-2 number, since 2×128883112 = 332217120865442, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 12888313, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p842477 and since 12888311 and 842477 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12888313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6444155 + 6444156.

It is an arithmetic number, because the mean of its divisors is an integer number (6444156).

Almost surely, 212888311 is an apocalyptic number.

12888311 is a deficient number, since it is larger than the sum of its proper divisors (1).

12888311 is an equidigital number, since it uses as much as digits as its factorization.

12888311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3072, while the sum is 32.

The square root of 12888311 is about 3590.0293870664. The cubic root of 12888311 is about 234.4581510238.

The spelling of 12888311 in words is "twelve million, eight hundred eighty-eight thousand, three hundred eleven".