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669447 = 3274383
BaseRepresentation
bin10100011011100000111
31021000022100
42203130013
5132410242
622203143
75455512
oct2433407
91230270
10669447
11417a69
122834b3
131a592c
14135d79
15d354c
hexa3707

669447 has 6 divisors (see below), whose sum is σ = 966992. Its totient is φ = 446292.

The previous prime is 669437. The next prime is 669451. The reversal of 669447 is 744966.

669447 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 669447 - 212 = 665351 is a prime.

It is a Duffinian number.

669447 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669437) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37183 + ... + 37200.

2669447 is an apocalyptic number.

669447 is a deficient number, since it is larger than the sum of its proper divisors (297545).

669447 is a wasteful number, since it uses less digits than its factorization.

669447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74389 (or 74386 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 669447 is about 818.1974089424. The cubic root of 669447 is about 87.4793202830.

The spelling of 669447 in words is "six hundred sixty-nine thousand, four hundred forty-seven".

Divisors: 1 3 9 74383 223149 669447