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8664431 is a prime number
BaseRepresentation
bin100001000011…
…010101101111
3121022012100212
4201003111233
54204230211
6505413035
7133434506
oct41032557
917265325
108664431
114988796
122a9a17b
131a449a9
14121783d
15b6238b
hex84356f

8664431 has 2 divisors, whose sum is σ = 8664432. Its totient is φ = 8664430.

The previous prime is 8664427. The next prime is 8664433. The reversal of 8664431 is 1344668.

8664431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8664431 - 22 = 8664427 is a prime.

It is a super-2 number, since 2×86644312 = 150144729107522, which contains 22 as substring.

Together with 8664433, it forms a pair of twin primes.

It is a Chen prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8664433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4332215 + 4332216.

It is an arithmetic number, because the mean of its divisors is an integer number (4332216).

Almost surely, 28664431 is an apocalyptic number.

8664431 is a deficient number, since it is larger than the sum of its proper divisors (1).

8664431 is an equidigital number, since it uses as much as digits as its factorization.

8664431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 32.

The square root of 8664431 is about 2943.5405551818. The cubic root of 8664431 is about 205.3903409510.

The spelling of 8664431 in words is "eight million, six hundred sixty-four thousand, four hundred thirty-one".