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268402697 is a prime number
BaseRepresentation
bin11111111111110…
…00000000001001
3200201001021021122
433333320000021
51022202341242
642344445025
76436246103
oct1777700011
9621037248
10268402697
11128562a12
1275a79775
13437b6a84
142790a573
151886bad2
hexfff8009

268402697 has 2 divisors, whose sum is σ = 268402698. Its totient is φ = 268402696.

The previous prime is 268402679. The next prime is 268402703. The reversal of 268402697 is 796204862.

Together with previous prime (268402679) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 268337161 + 65536 = 16381^2 + 256^2 .

It is a cyclic number.

It is not a de Polignac number, because 268402697 - 26 = 268402633 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (268402657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134201348 + 134201349.

It is an arithmetic number, because the mean of its divisors is an integer number (134201349).

Almost surely, 2268402697 is an apocalyptic number.

It is an amenable number.

268402697 is a deficient number, since it is larger than the sum of its proper divisors (1).

268402697 is an equidigital number, since it uses as much as digits as its factorization.

268402697 is an odious number, because the sum of its binary digits is odd.

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

The square root of 268402697 is about 16383.0002441555. Note that the first 3 decimals coincide. The cubic root of 268402697 is about 645.0533353328.

The spelling of 268402697 in words is "two hundred sixty-eight million, four hundred two thousand, six hundred ninety-seven".