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87043141 = 163534007
BaseRepresentation
bin1010011000000…
…10110001000101
320001210020202001
411030002301011
5134240340031
612345345301
72104566043
oct514026105
9201706661
1087043141
1145151889
1225198231
1315058123
14b7bb393
157995861
hex5302c45

87043141 has 4 divisors (see below), whose sum is σ = 87577312. Its totient is φ = 86508972.

The previous prime is 87043091. The next prime is 87043147. The reversal of 87043141 is 14134078.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 87043141 - 215 = 87010373 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 (87043147) 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, 266841 + ... + 267166.

It is an arithmetic number, because the mean of its divisors is an integer number (21894328).

Almost surely, 287043141 is an apocalyptic number.

It is an amenable number.

87043141 is a deficient number, since it is larger than the sum of its proper divisors (534171).

87043141 is a wasteful number, since it uses less digits than its factorization.

87043141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534170.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 87043141 is about 9329.6913668138. The cubic root of 87043141 is about 443.1779913790.

The spelling of 87043141 in words is "eighty-seven million, forty-three thousand, one hundred forty-one".

Divisors: 1 163 534007 87043141