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276389 is a prime number
BaseRepresentation
bin1000011011110100101
3112001010122
41003132211
532321024
65531325
72230541
oct1033645
9461118
10276389
11179723
12113b45
1398a59
1472a21
1556d5e
hex437a5

276389 has 2 divisors, whose sum is σ = 276390. Its totient is φ = 276388.

The previous prime is 276373. The next prime is 276401. The reversal of 276389 is 983672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148225 + 128164 = 385^2 + 358^2 .

It is a cyclic number.

It is not a de Polignac number, because 276389 - 24 = 276373 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (276319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138194 + 138195.

It is an arithmetic number, because the mean of its divisors is an integer number (138195).

2276389 is an apocalyptic number.

It is an amenable number.

276389 is a deficient number, since it is larger than the sum of its proper divisors (1).

276389 is an equidigital number, since it uses as much as digits as its factorization.

276389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 35.

The square root of 276389 is about 525.7271155267. The cubic root of 276389 is about 65.1388746759.

The spelling of 276389 in words is "two hundred seventy-six thousand, three hundred eighty-nine".