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89160031 = 421721143
BaseRepresentation
bin1010101000001…
…11100101011111
320012202210120101
411110013211133
5140311110111
612503001531
72131563532
oct524074537
9205683511
1089160031
1146368284
1225a392a7
131561981c
14bbaca19
157c62bc1
hex550795f

89160031 has 4 divisors (see below), whose sum is σ = 89185392. Its totient is φ = 89134672.

The previous prime is 89160023. The next prime is 89160037. The reversal of 89160031 is 13006198.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13006198 = 26503099.

It is a cyclic number.

It is not a de Polignac number, because 89160031 - 23 = 89160023 is a prime.

It is a super-2 number, since 2×891600312 = 15899022255841922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89160037) 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, 6355 + ... + 14788.

It is an arithmetic number, because the mean of its divisors is an integer number (22296348).

Almost surely, 289160031 is an apocalyptic number.

89160031 is a deficient number, since it is larger than the sum of its proper divisors (25361).

89160031 is a wasteful number, since it uses less digits than its factorization.

89160031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25360.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 89160031 is about 9442.4589488120. The cubic root of 89160031 is about 446.7419514324.

The spelling of 89160031 in words is "eighty-nine million, one hundred sixty thousand, thirty-one".

Divisors: 1 4217 21143 89160031