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68619713 = 292139587
BaseRepresentation
bin1000001011100…
…00110111000001
311210010020112212
410011300313001
5120031312323
610450431505
71462154321
oct405606701
9153106485
1068619713
1135809008
121ab92595
13112a74a6
149183281
156056b78
hex4170dc1

68619713 has 12 divisors (see below), whose sum is σ = 71700720. Its totient is φ = 65664816.

The previous prime is 68619679. The next prime is 68619731. The reversal of 68619713 is 31791686.

It is not a de Polignac number, because 68619713 - 214 = 68603329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68619913) 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 11 ways as a sum of consecutive naturals, for example, 116606 + ... + 117192.

It is an arithmetic number, because the mean of its divisors is an integer number (5975060).

Almost surely, 268619713 is an apocalyptic number.

It is an amenable number.

68619713 is a deficient number, since it is larger than the sum of its proper divisors (3081007).

68619713 is a wasteful number, since it uses less digits than its factorization.

68619713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784 (or 755 counting only the distinct ones).

The product of its digits is 54432, while the sum is 41.

The square root of 68619713 is about 8283.7016484178. The cubic root of 68619713 is about 409.4016912690.

The spelling of 68619713 in words is "sixty-eight million, six hundred nineteen thousand, seven hundred thirteen".

Divisors: 1 29 139 587 841 4031 17023 81593 116899 493667 2366197 68619713