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68169189 = 3112065733
BaseRepresentation
bin1000001000000…
…10110111100101
311202021100112210
410010002313211
5114422403224
610433034033
71455266664
oct404026745
9152240483
1068169189
1135530580
121a9b5919
131117a3ca
1490a6ddb
155eb8429
hex4102de5

68169189 has 8 divisors (see below), whose sum is σ = 99155232. Its totient is φ = 41314640.

The previous prime is 68169187. The next prime is 68169193. The reversal of 68169189 is 98196186.

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 68169189 - 21 = 68169187 is a prime.

68169189 is a strobogrammatic number because it is the same when read upside-down.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68169181) 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, 1032834 + ... + 1032899.

It is an arithmetic number, because the mean of its divisors is an integer number (12394404).

Almost surely, 268169189 is an apocalyptic number.

It is an amenable number.

68169189 is a deficient number, since it is larger than the sum of its proper divisors (30986043).

68169189 is a wasteful number, since it uses less digits than its factorization.

68169189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2065747.

The product of its digits is 186624, while the sum is 48.

The square root of 68169189 is about 8256.4634680958. The cubic root of 68169189 is about 408.5037450960.

The spelling of 68169189 in words is "sixty-eight million, one hundred sixty-nine thousand, one hundred eighty-nine".

Divisors: 1 3 11 33 2065733 6197199 22723063 68169189