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68654401 = 397172933
BaseRepresentation
bin1000001011110…
…01010101000001
311210012000010121
410011321111001
5120033420101
610451300241
71462360414
oct405712501
9153160117
1068654401
1135832082
121abaa681
13112ba20a
149191b7b
1560620a1
hex4179541

68654401 has 4 divisors (see below), whose sum is σ = 68827732. Its totient is φ = 68481072.

The previous prime is 68654389. The next prime is 68654437. The reversal of 68654401 is 10445686.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10445686 = 25222843.

It can be written as a sum of positive squares in 2 ways, for example, as 39753025 + 28901376 = 6305^2 + 5376^2 .

It is a cyclic number.

It is not a de Polignac number, because 68654401 - 29 = 68653889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68654441) 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, 86070 + ... + 86863.

It is an arithmetic number, because the mean of its divisors is an integer number (17206933).

Almost surely, 268654401 is an apocalyptic number.

It is an amenable number.

68654401 is a deficient number, since it is larger than the sum of its proper divisors (173331).

68654401 is a wasteful number, since it uses less digits than its factorization.

68654401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173330.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 68654401 is about 8285.7951338420. The cubic root of 68654401 is about 409.4706652948.

The spelling of 68654401 in words is "sixty-eight million, six hundred fifty-four thousand, four hundred one".

Divisors: 1 397 172933 68654401