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25679999 is a prime number
BaseRepresentation
bin110000111110…
…1100001111111
31210022200100002
41201331201333
523033224444
62314224515
7431163542
oct141754177
953280302
1025679999
111354a844
12872513b
135421887
1435a6859
1523c3d4e
hex187d87f

25679999 has 2 divisors, whose sum is σ = 25680000. Its totient is φ = 25679998.

The previous prime is 25679989. The next prime is 25680007. The reversal of 25679999 is 99997652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25679999 - 28 = 25679743 is a prime.

It is a Sophie Germain prime.

25679999 is a modest number, since divided by 9999 gives 2567 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25679959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12839999 + 12840000.

It is an arithmetic number, because the mean of its divisors is an integer number (12840000).

Almost surely, 225679999 is an apocalyptic number.

25679999 is a deficient number, since it is larger than the sum of its proper divisors (1).

25679999 is an equidigital number, since it uses as much as digits as its factorization.

25679999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2755620, while the sum is 56.

The square root of 25679999 is about 5067.5436850608. The cubic root of 25679999 is about 295.0291994462.

The spelling of 25679999 in words is "twenty-five million, six hundred seventy-nine thousand, nine hundred ninety-nine".