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9969665 = 51993933
BaseRepresentation
bin100110000010…
…000000000001
3200202111210212
4212002000001
510023012130
6553403505
7150512036
oct46020001
920674725
109969665
11569a3a2
123409595
1320b0b14
14147738d
15d1de95
hex982001

9969665 has 4 divisors (see below), whose sum is σ = 11963604. Its totient is φ = 7975728.

The previous prime is 9969653. The next prime is 9969689. The reversal of 9969665 is 5669699.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5424241 + 4545424 = 2329^2 + 2132^2 .

It is a cyclic number.

It is not a de Polignac number, because 9969665 - 210 = 9968641 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 996962 + ... + 996971.

It is an arithmetic number, because the mean of its divisors is an integer number (2990901).

It is a Proth number, since it is equal to 1217 ⋅ 213 + 1 and 1217 < 213.

Almost surely, 29969665 is an apocalyptic number.

It is an amenable number.

9969665 is a deficient number, since it is larger than the sum of its proper divisors (1993939).

9969665 is a wasteful number, since it uses less digits than its factorization.

9969665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1993938.

The product of its digits is 787320, while the sum is 50.

The square root of 9969665 is about 3157.4776325415. The cubic root of 9969665 is about 215.2253990949.

The spelling of 9969665 in words is "nine million, nine hundred sixty-nine thousand, six hundred sixty-five".

Divisors: 1 5 1993933 9969665