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688927513 is a prime number
BaseRepresentation
bin101001000100000…
…011001100011001
31210000100010212211
4221010003030121
52402331140023
6152210035121
723033534011
oct5104031431
91700303784
10688927513
1132397748a
12172878aa1
13ac963621
14676d4c41
1540736a0d
hex29103319

688927513 has 2 divisors, whose sum is σ = 688927514. Its totient is φ = 688927512.

The previous prime is 688927471. The next prime is 688927523. The reversal of 688927513 is 315729886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 678706704 + 10220809 = 26052^2 + 3197^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-688927513 is a prime.

It is a super-2 number, since 2×6889275132 = 949242236336730338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (688927523) 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 as a sum of consecutive naturals, namely, 344463756 + 344463757.

It is an arithmetic number, because the mean of its divisors is an integer number (344463757).

Almost surely, 2688927513 is an apocalyptic number.

It is an amenable number.

688927513 is a deficient number, since it is larger than the sum of its proper divisors (1).

688927513 is an equidigital number, since it uses as much as digits as its factorization.

688927513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 49.

The square root of 688927513 is about 26247.4286931120. The cubic root of 688927513 is about 883.1975243288.

The spelling of 688927513 in words is "six hundred eighty-eight million, nine hundred twenty-seven thousand, five hundred thirteen".