Search a number
-
+
68510371 = 193605809
BaseRepresentation
bin1000001010101…
…10001010100011
311202220200120011
410011112022203
5120014312441
610444225351
71461220456
oct405261243
9152820504
1068510371
1135743946
121ab3b257
13112697a7
14915549d
156034581
hex41562a3

68510371 has 4 divisors (see below), whose sum is σ = 72116200. Its totient is φ = 64904544.

The previous prime is 68510359. The next prime is 68510389. The reversal of 68510371 is 17301586.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17301586 = 28650793.

It is a cyclic number.

It is not a de Polignac number, because 68510371 - 213 = 68502179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68510311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1802886 + ... + 1802923.

It is an arithmetic number, because the mean of its divisors is an integer number (18029050).

Almost surely, 268510371 is an apocalyptic number.

68510371 is a deficient number, since it is larger than the sum of its proper divisors (3605829).

68510371 is a wasteful number, since it uses less digits than its factorization.

68510371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3605828.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 68510371 is about 8277.0991899336. The cubic root of 68510371 is about 409.1841221204.

The spelling of 68510371 in words is "sixty-eight million, five hundred ten thousand, three hundred seventy-one".

Divisors: 1 19 3605809 68510371