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256760137 is a prime number
BaseRepresentation
bin11110100110111…
…01100101001001
3122220010202200201
433103131211021
51011212311022
641251132201
76235265554
oct1723354511
9586122621
10256760137
11121a30767
1271ba4061
134126b69a
142615969b
151781c127
hexf4dd949

256760137 has 2 divisors, whose sum is σ = 256760138. Its totient is φ = 256760136.

The previous prime is 256760123. The next prime is 256760213. The reversal of 256760137 is 731067652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133194681 + 123565456 = 11541^2 + 11116^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-256760137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256760096 and 256760105.

It is not a weakly prime, because it can be changed into another prime (256760117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128380068 + 128380069.

It is an arithmetic number, because the mean of its divisors is an integer number (128380069).

Almost surely, 2256760137 is an apocalyptic number.

It is an amenable number.

256760137 is a deficient number, since it is larger than the sum of its proper divisors (1).

256760137 is an equidigital number, since it uses as much as digits as its factorization.

256760137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 256760137 is about 16023.7366740720. The cubic root of 256760137 is about 635.5882593036.

The spelling of 256760137 in words is "two hundred fifty-six million, seven hundred sixty thousand, one hundred thirty-seven".