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89816545 = 57131091811
BaseRepresentation
bin1010101101001…
…11110111100001
320021000011010201
411112213313201
5140443112140
612525025201
72140266550
oct526476741
9207004121
1089816545
1146776555
12260b5201
13157b95b0
14bcddd97
157d4249a
hex55a7de1

89816545 has 32 divisors (see below), whose sum is σ = 133943040. Its totient is φ = 56298240.

The previous prime is 89816543. The next prime is 89816563. The reversal of 89816545 is 54561898.

It is not a de Polignac number, because 89816545 - 21 = 89816543 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 89816495 and 89816504.

It is not an unprimeable number, because it can be changed into a prime (89816543) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48690 + ... + 50500.

It is an arithmetic number, because the mean of its divisors is an integer number (4185720).

It is a Poulet number, since it divides 289816544-1.

Almost surely, 289816545 is an apocalyptic number.

It is an amenable number.

89816545 is a deficient number, since it is larger than the sum of its proper divisors (44126495).

89816545 is a wasteful number, since it uses less digits than its factorization.

89816545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1945.

The product of its digits is 345600, while the sum is 46.

The square root of 89816545 is about 9477.1591207492. The cubic root of 89816545 is about 447.8357726734.

The spelling of 89816545 in words is "eighty-nine million, eight hundred sixteen thousand, five hundred forty-five".

Divisors: 1 5 7 13 35 65 91 109 455 545 763 1417 1811 3815 7085 9055 9919 12677 23543 49595 63385 117715 164801 197399 824005 986995 1381793 2566187 6908965 12830935 17963309 89816545