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68698005 = 357957973
BaseRepresentation
bin1000001100000…
…11111110010101
311210021012221120
410012003332111
5120041314010
610452234153
71462631505
oct406037625
9153235846
1068698005
1135861912
121b00b959
131130400c
1491a3a05
15606ee70
hex4183f95

68698005 has 16 divisors (see below), whose sum is σ = 111310080. Its totient is φ = 36174528.

The previous prime is 68697997. The next prime is 68698009. The reversal of 68698005 is 50089686.

It is not a de Polignac number, because 68698005 - 23 = 68697997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68698009) 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 in 15 ways as a sum of consecutive naturals, for example, 27802 + ... + 30171.

It is an arithmetic number, because the mean of its divisors is an integer number (6956880).

Almost surely, 268698005 is an apocalyptic number.

It is an amenable number.

68698005 is a deficient number, since it is larger than the sum of its proper divisors (42612075).

68698005 is a wasteful number, since it uses less digits than its factorization.

68698005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58060.

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 68698005 is about 8288.4259663702. The cubic root of 68698005 is about 409.5573350495.

The spelling of 68698005 in words is "sixty-eight million, six hundred ninety-eight thousand, five".

Divisors: 1 3 5 15 79 237 395 1185 57973 173919 289865 869595 4579867 13739601 22899335 68698005