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268402679 is a prime number
BaseRepresentation
bin11111111111101…
…11111111110111
3200201001021020222
433333313333313
51022202341204
642344444555
76436246046
oct1777677767
9621037228
10268402679
111285629a6
1275a7975b
13437b6a6c
142790a55d
151886babe
hexfff7ff7

268402679 has 2 divisors, whose sum is σ = 268402680. Its totient is φ = 268402678.

The previous prime is 268402669. The next prime is 268402697. The reversal of 268402679 is 976204862.

Together with next prime (268402697) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 268402679 - 224 = 251625463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268402669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134201339 + 134201340.

It is an arithmetic number, because the mean of its divisors is an integer number (134201340).

Almost surely, 2268402679 is an apocalyptic number.

268402679 is a deficient number, since it is larger than the sum of its proper divisors (1).

268402679 is an equidigital number, since it uses as much as digits as its factorization.

268402679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 268402679 is about 16382.9996948056. Note that the first 3 decimals coincide. The cubic root of 268402679 is about 645.0533209129.

The spelling of 268402679 in words is "two hundred sixty-eight million, four hundred two thousand, six hundred seventy-nine".