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68086879 = 747206951
BaseRepresentation
bin1000000111011…
…10110001011111
311202010011122021
410003232301133
5114412240004
610431201011
71454505010
oct403566137
9152104567
1068086879
1135484753
121a976167
131114bac3
149085007
155e9dd54
hex40eec5f

68086879 has 8 divisors (see below), whose sum is σ = 79469568. Its totient is φ = 57118200.

The previous prime is 68086873. The next prime is 68086883. The reversal of 68086879 is 97868086.

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 68086879 - 23 = 68086871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68086871) 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, 103147 + ... + 103804.

It is an arithmetic number, because the mean of its divisors is an integer number (9933696).

Almost surely, 268086879 is an apocalyptic number.

68086879 is a deficient number, since it is larger than the sum of its proper divisors (11382689).

68086879 is a wasteful number, since it uses less digits than its factorization.

68086879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207005.

The product of its (nonzero) digits is 1161216, while the sum is 52.

The square root of 68086879 is about 8251.4773828691. The cubic root of 68086879 is about 408.3392647017.

The spelling of 68086879 in words is "sixty-eight million, eighty-six thousand, eight hundred seventy-nine".

Divisors: 1 7 47 329 206951 1448657 9726697 68086879