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7009813 = 31226123
BaseRepresentation
bin11010101111011000010101
3111012010122201
4122233120111
53243303223
6410124501
7113403526
oct32573025
914163581
107009813
113a58638
122420731
1315b5825
14d0684d
15936ead
hex6af615

7009813 has 4 divisors (see below), whose sum is σ = 7235968. Its totient is φ = 6783660.

The previous prime is 7009801. The next prime is 7009823. The reversal of 7009813 is 3189007.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-7009813 is a prime.

It is a super-3 number, since 3×70098133 (a number of 22 digits) contains 333 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 (7009823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113031 + ... + 113092.

It is an arithmetic number, because the mean of its divisors is an integer number (1808992).

Almost surely, 27009813 is an apocalyptic number.

It is an amenable number.

7009813 is a deficient number, since it is larger than the sum of its proper divisors (226155).

7009813 is a wasteful number, since it uses less digits than its factorization.

7009813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226154.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 7009813 is about 2647.6051442766. The cubic root of 7009813 is about 191.3824650812.

The spelling of 7009813 in words is "seven million, nine thousand, eight hundred thirteen".

Divisors: 1 31 226123 7009813