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84712231 is a prime number
BaseRepresentation
bin1010000110010…
…01101100100111
312220101211100001
411003021230213
5133141242411
612223402131
72046020302
oct503115447
9186354301
1084712231
11438aa60a
1224453347
13147201a6
14b371b39
157684dc1
hex50c9b27

84712231 has 2 divisors, whose sum is σ = 84712232. Its totient is φ = 84712230.

The previous prime is 84712217. The next prime is 84712261. The reversal of 84712231 is 13221748.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84712231 - 221 = 82615079 is a prime.

It is a super-2 number, since 2×847122312 = 14352324161994722, which contains 22 as substring.

It is a Chen prime.

It is equal to p4928005 and since 84712231 and 4928005 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84712231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84712211) 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, 42356115 + 42356116.

It is an arithmetic number, because the mean of its divisors is an integer number (42356116).

Almost surely, 284712231 is an apocalyptic number.

84712231 is a deficient number, since it is larger than the sum of its proper divisors (1).

84712231 is an equidigital number, since it uses as much as digits as its factorization.

84712231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 28.

The square root of 84712231 is about 9203.9247606660. The cubic root of 84712231 is about 439.1862213979.

Adding to 84712231 its reverse (13221748), we get a palindrome (97933979).

The spelling of 84712231 in words is "eighty-four million, seven hundred twelve thousand, two hundred thirty-one".