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67930489 = 112561409
BaseRepresentation
bin1000000110010…
…00100101111001
311201211020010001
410003020211321
5114342233424
610423553001
71453254034
oct403104571
9151736101
1067930489
1135388200
121a8bb761
13110c5873
14904401b
155e6c844
hex40c8979

67930489 has 6 divisors (see below), whose sum is σ = 74667530. Its totient is φ = 61754880.

The previous prime is 67930459. The next prime is 67930493. The reversal of 67930489 is 98403976.

It can be written as a sum of positive squares in only one way, i.e., 45765225 + 22165264 = 6765^2 + 4708^2 .

It is a de Polignac number, because none of the positive numbers 2k-67930489 is a prime.

It is a super-2 number, since 2×679304892 = 9229102671558242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67930439) 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 5 ways as a sum of consecutive naturals, for example, 280584 + ... + 280825.

Almost surely, 267930489 is an apocalyptic number.

It is an amenable number.

67930489 is a deficient number, since it is larger than the sum of its proper divisors (6737041).

67930489 is a wasteful number, since it uses less digits than its factorization.

67930489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561431 (or 561420 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 67930489 is about 8241.9954501322. The cubic root of 67930489 is about 408.0263843792.

The spelling of 67930489 in words is "sixty-seven million, nine hundred thirty thousand, four hundred eighty-nine".

Divisors: 1 11 121 561409 6175499 67930489