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87106079 = 175123887
BaseRepresentation
bin1010011000100…
…10001000011111
320001220110002002
411030102020133
5134244343304
612350552515
72105250404
oct514221037
9201813062
1087106079
11451950a5
122520873b
131507a978
14b7d62ab
1579a931e
hex531221f

87106079 has 4 divisors (see below), whose sum is σ = 92229984. Its totient is φ = 81982176.

The previous prime is 87106067. The next prime is 87106133. The reversal of 87106079 is 97060178.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97060178 = 248530089.

It is a cyclic number.

It is not a de Polignac number, because 87106079 - 216 = 87040543 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 (87109079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2561927 + ... + 2561960.

It is an arithmetic number, because the mean of its divisors is an integer number (23057496).

Almost surely, 287106079 is an apocalyptic number.

87106079 is a deficient number, since it is larger than the sum of its proper divisors (5123905).

87106079 is a wasteful number, since it uses less digits than its factorization.

87106079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5123904.

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 87106079 is about 9333.0637520591. The cubic root of 87106079 is about 443.2847813992.

The spelling of 87106079 in words is "eighty-seven million, one hundred six thousand, seventy-nine".

Divisors: 1 17 5123887 87106079