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87104401 = 376138593
BaseRepresentation
bin1010011000100…
…01101110010001
320001220100202221
411030101232101
5134244320101
612350541041
72105242456
oct514215621
9201810687
1087104401
114519390a
1225207781
1315079c87
14b7d582d
1579a8aa1
hex5311b91

87104401 has 8 divisors (see below), whose sum is σ = 90927464. Its totient is φ = 83358720.

The previous prime is 87104393. The next prime is 87104419. The reversal of 87104401 is 10440178.

It can be written as a sum of positive squares in 4 ways, for example, as 14258176 + 72846225 = 3776^2 + 8535^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87104401 - 23 = 87104393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87104441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17040 + ... + 21553.

It is an arithmetic number, because the mean of its divisors is an integer number (11365933).

Almost surely, 287104401 is an apocalyptic number.

It is an amenable number.

87104401 is a deficient number, since it is larger than the sum of its proper divisors (3823063).

87104401 is a wasteful number, since it uses less digits than its factorization.

87104401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38691.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 87104401 is about 9332.9738561725. The cubic root of 87104401 is about 443.2819349211.

Adding to 87104401 its reverse (10440178), we get a palindrome (97544579).

The spelling of 87104401 in words is "eighty-seven million, one hundred four thousand, four hundred one".

Divisors: 1 37 61 2257 38593 1427941 2354173 87104401