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8987897 = 41219217
BaseRepresentation
bin100010010010…
…010011111001
3121220122002002
4202102103321
54300103042
6520350345
7136252532
oct42222371
917818062
108987897
115089816
1230153b5
131b28ca9
14129d689
15bc8132
hex8924f9

8987897 has 4 divisors (see below), whose sum is σ = 9207156. Its totient is φ = 8768640.

The previous prime is 8987851. The next prime is 8987911. The reversal of 8987897 is 7987898.

Subtracting from 8987897 its reverse (7987898), we obtain a palindrome (999999).

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7987898 = 23993949.

It can be written as a sum of positive squares in 2 ways, for example, as 583696 + 8404201 = 764^2 + 2899^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-8987897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8987807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109568 + ... + 109649.

It is an arithmetic number, because the mean of its divisors is an integer number (2301789).

Almost surely, 28987897 is an apocalyptic number.

It is an amenable number.

8987897 is a deficient number, since it is larger than the sum of its proper divisors (219259).

8987897 is a wasteful number, since it uses less digits than its factorization.

8987897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219258.

The product of its digits is 2032128, while the sum is 56.

The square root of 8987897 is about 2997.9821547167. The cubic root of 8987897 is about 207.9150987941.

The spelling of 8987897 in words is "eight million, nine hundred eighty-seven thousand, eight hundred ninety-seven".

Divisors: 1 41 219217 8987897