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68177389 = 721614507
BaseRepresentation
bin1000001000001…
…00110111101101
311202021202210111
410010010313231
5114423134024
610433140021
71455332620
oct404046755
9152252714
1068177389
1135536755
121a9ba611
1311181067
1490a9db7
155ebaa94
hex4104ded

68177389 has 8 divisors (see below), whose sum is σ = 77970368. Its totient is φ = 58397760.

The previous prime is 68177381. The next prime is 68177393. The reversal of 68177389 is 98377186.

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 68177389 - 23 = 68177381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68177381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12874 + ... + 17380.

It is an arithmetic number, because the mean of its divisors is an integer number (9746296).

Almost surely, 268177389 is an apocalyptic number.

It is an amenable number.

68177389 is a deficient number, since it is larger than the sum of its proper divisors (9792979).

68177389 is a wasteful number, since it uses less digits than its factorization.

68177389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6675.

The product of its digits is 508032, while the sum is 49.

The square root of 68177389 is about 8256.9600338139. The cubic root of 68177389 is about 408.5201239345.

The spelling of 68177389 in words is "sixty-eight million, one hundred seventy-seven thousand, three hundred eighty-nine".

Divisors: 1 7 2161 4507 15127 31549 9739627 68177389