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87364643 = 178748889
BaseRepresentation
bin1010011010100…
…01010000100011
320002101120202112
411031101100203
5134331132033
612400305535
72110405262
oct515212043
9202346675
1087364643
1145351393
12253122ab
131513b572
14b8625d9
157a0ac48
hex5351423

87364643 has 4 divisors (see below), whose sum is σ = 87415320. Its totient is φ = 87313968.

The previous prime is 87364639. The next prime is 87364661. The reversal of 87364643 is 34646378.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 87364643 - 22 = 87364639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87364643.

It is not an unprimeable number, because it can be changed into a prime (87364243) 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 3 ways as a sum of consecutive naturals, for example, 22658 + ... + 26231.

It is an arithmetic number, because the mean of its divisors is an integer number (21853830).

Almost surely, 287364643 is an apocalyptic number.

87364643 is a deficient number, since it is larger than the sum of its proper divisors (50677).

87364643 is a wasteful number, since it uses less digits than its factorization.

87364643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50676.

The product of its digits is 290304, while the sum is 41.

The square root of 87364643 is about 9346.9055307091. The cubic root of 87364643 is about 443.7229607805.

The spelling of 87364643 in words is "eighty-seven million, three hundred sixty-four thousand, six hundred forty-three".

Divisors: 1 1787 48889 87364643