[go: up one dir, main page]

Search a number
-
+
8078131 is a prime number
BaseRepresentation
bin11110110100001100110011
3120012102010001
4132310030303
54032000011
6445050431
7125443255
oct36641463
916172101
108078131
114618246
122856a17
13189ab79
141103cd5
15a987c1
hex7b4333

8078131 has 2 divisors, whose sum is σ = 8078132. Its totient is φ = 8078130.

The previous prime is 8078113. The next prime is 8078143. The reversal of 8078131 is 1318708.

It is a happy number.

Together with previous prime (8078113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8078131 - 27 = 8078003 is a prime.

It is a super-2 number, since 2×80781312 = 130512400906322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8078131.

It is not a weakly prime, because it can be changed into another prime (8078431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4039065 + 4039066.

It is an arithmetic number, because the mean of its divisors is an integer number (4039066).

Almost surely, 28078131 is an apocalyptic number.

8078131 is a deficient number, since it is larger than the sum of its proper divisors (1).

8078131 is an equidigital number, since it uses as much as digits as its factorization.

8078131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 8078131 is about 2842.2053057441. The cubic root of 8078131 is about 200.6489834910.

The spelling of 8078131 in words is "eight million, seventy-eight thousand, one hundred thirty-one".