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87318001 = 177173991
BaseRepresentation
bin1010011010001…
…01110111110001
320002022012210001
411031011313301
5134323134001
612355310001
72110122301
oct515056761
9202265701
1087318001
114531a341
12252ab301
1315123274
14b84d601
1579ec001
hex5345df1

87318001 has 16 divisors (see below), whose sum is σ = 95136768. Its totient is φ = 79833600.

The previous prime is 87317983. The next prime is 87318013. The reversal of 87318001 is 10081378.

It is a happy number.

It is a 3-Lehmer number, since φ(87318001) divides (87318001-1)3.

It is a cyclic number.

It is a Carmichael number.

It is not a de Polignac number, because 87318001 - 25 = 87317969 is a prime.

It is a deceptive number, since it divides R87318000.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87318061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87616 + ... + 88606.

It is an arithmetic number, because the mean of its divisors is an integer number (5946048).

It is a Poulet number, since it divides 287318000-1.

Almost surely, 287318001 is an apocalyptic number.

It is an amenable number.

87318001 is a deficient number, since it is larger than the sum of its proper divisors (7818767).

87318001 is a wasteful number, since it uses less digits than its factorization.

87318001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 87318001 is about 9344.4101472485. The cubic root of 87318001 is about 443.6439821847.

Adding to 87318001 its reverse (10081378), we get a palindrome (97399379).

The spelling of 87318001 in words is "eighty-seven million, three hundred eighteen thousand, one".

Divisors: 1 17 71 73 991 1207 1241 5183 16847 70361 72343 88111 1196137 1229831 5136353 87318001