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68189957 = 117384919
BaseRepresentation
bin1000001000001…
…11111100000101
311202022102000222
410010013330011
5114424034312
610433314125
71455414353
oct404077405
9152272028
1068189957
1135545140
121aa05945
13111869b4
1490b07d3
155ebe672
hex4107f05

68189957 has 8 divisors (see below), whose sum is σ = 75408960. Its totient is φ = 61140960.

The previous prime is 68189861. The next prime is 68189971. The reversal of 68189957 is 75998186.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68189957 - 216 = 68124421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68189899 and 68189908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68189857) 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 7 ways as a sum of consecutive naturals, for example, 41657 + ... + 43262.

It is an arithmetic number, because the mean of its divisors is an integer number (9426120).

Almost surely, 268189957 is an apocalyptic number.

It is an amenable number.

68189957 is a deficient number, since it is larger than the sum of its proper divisors (7219003).

68189957 is a wasteful number, since it uses less digits than its factorization.

68189957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85003.

The product of its digits is 1088640, while the sum is 53.

The square root of 68189957 is about 8257.7210536564. The cubic root of 68189957 is about 408.5452249518.

The spelling of 68189957 in words is "sixty-eight million, one hundred eighty-nine thousand, nine hundred fifty-seven".

Divisors: 1 11 73 803 84919 934109 6199087 68189957