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25000643 is a prime number
BaseRepresentation
bin101111101011…
…1101011000011
31202001011102202
41133113223003
522400010033
62251503415
7422334113
oct137275303
952034382
1025000643
1113126398
128457b6b
1352445a5
14346b043
1522dc8e8
hex17d7ac3

25000643 has 2 divisors, whose sum is σ = 25000644. Its totient is φ = 25000642.

The previous prime is 25000627. The next prime is 25000649. The reversal of 25000643 is 34600052.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25000643 - 24 = 25000627 is a prime.

It is not a weakly prime, because it can be changed into another prime (25000649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12500321 + 12500322.

It is an arithmetic number, because the mean of its divisors is an integer number (12500322).

Almost surely, 225000643 is an apocalyptic number.

25000643 is a deficient number, since it is larger than the sum of its proper divisors (1).

25000643 is an equidigital number, since it uses as much as digits as its factorization.

25000643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 25000643 is about 5000.0642995866. The cubic root of 25000643 is about 292.4042806577.

Adding to 25000643 its reverse (34600052), we get a palindrome (59600695).

The spelling of 25000643 in words is "twenty-five million, six hundred forty-three", and thus it is an aban number.