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87955087 = 117995917
BaseRepresentation
bin1010011111000…
…01011010001111
320010111120200211
411033201122033
5140004030322
612421103251
72115414553
oct517413217
9203446624
1087955087
1145714a60
1225557b27
13152b723c
14b977863
157ac5b77
hex53e168f

87955087 has 4 divisors (see below), whose sum is σ = 95951016. Its totient is φ = 79959160.

The previous prime is 87955069. The next prime is 87955097. The reversal of 87955087 is 78055978.

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 87955087 - 215 = 87922319 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 87955087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87955067) 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, 3997948 + ... + 3997969.

It is an arithmetic number, because the mean of its divisors is an integer number (23987754).

Almost surely, 287955087 is an apocalyptic number.

87955087 is a deficient number, since it is larger than the sum of its proper divisors (7995929).

87955087 is a wasteful number, since it uses less digits than its factorization.

87955087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7995928.

The product of its (nonzero) digits is 705600, while the sum is 49.

The square root of 87955087 is about 9378.4373431825. The cubic root of 87955087 is about 444.7203343141.

The spelling of 87955087 in words is "eighty-seven million, nine hundred fifty-five thousand, eighty-seven".

Divisors: 1 11 7995917 87955087